[2024]
Keito Murata, Gyo Kitahara, Satoru Inoue, Toshiki Higashino, Satoshi Matsuoka, Shunto Arai, Reiji Kumai, Tatsuo Hasegawa. Stability of ternary interfaces and its effects on ideal switching characteristics in inverted coplanar organic transistors. Physical Review Applied. 2024. 21. 2
Satoru Inoue, Toshiki Higashino, Kiyoshi Nikaido, Ryo Miyata, Satoshi Matsuoka, Mutsuo Tanaka, Seiji Tsuzuki, Sachio Horiuchi, Ryusuke Kondo, Ryoko Sagayama, Reiji Kumai, Daiki Sekine, Takayoshi Koyanagi, Masakazu Matsubara, Tatsuo Hasegawa. Control of Polar/Antipolar Layered Organic Semiconductors by the Odd-Even Effect of Alkyl Chain. Advanced Science. 2024
Toshiki Higashino, Satoru Inoue, Shunto Arai, Seiji Tsuzuki, Hiroyuki Matsui, Reiji Kumai, Kiyofumi Takaba, Saori Maki-Yonekura, Hirofumi Kurokawa, Ichiro Inoue, Kensuke Tono, Koji Yonekura, and Tatsuo Hasegawa. Effects of Thiophene-Fused Isomer on High-Layered Crystallinity in π-Extended and Alkylated Organic Semiconductors. Chemistry of Materials. 2024. 36. 2. 848-859
[2023]
Yohei Uemura, Satoshi Matsuoka, Shunto Arai, Jun Harada, and Tatsuo Hasegawa, "Intersecting multiaxial domain walls in plastic ferroelectric crystal films",Phys. Rev. Materials 7, 035601 (2023).
Shunto Arai, Satoru Inoue, Mutsuo Tanaka, Seiji Tsuzuki, Ryusuke Kondo, Reiji Kumai, and Tatsuo Hasegawa, "Temperature-induced transformation between layered herringbone polymorphs in molecular bilayer organic semiconductors",Phys. Rev. Materials 7, 025602 (2023).
Collaborated Research
Yudai Hemmi, Yuji Ikeda, Radu A. Sporea, Satoru Inoue, Tatsuo Hasegawa, and Hiroyuki Matsui, ”Printed 700 V/V gain amplifiers based on organic source‐gated transistors with field plates”, Adv. Electron. Mater., (early view 2201263)(2023).
N. Takamura, T. Miyamoto, S. Liang, K. Asada, T. Terashige, Y. Takahashi, T. Hasegawa, and H. Okamoto, "Efficient Mott insulator-metal transition by an intense terahertz electric field pulse via quantum tunneling", Phys. Rev. B 107, 085147 (2023).
Yu Dong, Ming-Min Yang, Mao Yoshii, Satoshi Matsuoka, Sota Kitamura, Tatsuo Hasegawa, Naoki Ogawa, Takahiro Morimoto, Toshiya Ideue, and Yoshihiro Iwasa, ”Giant bulk piezophotovoltaic effect in 3R-MoS2”, Nature Nanotech. 18, 36-41 (2023).
[2022]
長谷川 達生、井上 悟「層状結晶性有機半導体による塗布型トランジスタの高急峻スイッチング」,応用物理 2022年91巻10号 p.613-618., (2022).
Tatsuo Hasegawa and Satoru Inoue, "Extremely sharp switching operation of printed transistors using highly layered crystalline organic semiconductors", (Tutorial Review) [Open access]JSAP Review vol.2022, (2022).
S. Matsuoka, K. Ogawa, R. Ono, K. Nikaido, S. Inoue, T. Higashino, M. Tanaka, J. Tsutsumi, R. Kondo, R. Kumai, S. Tsuzuki, S. Arai, T. Hasegawa, "Highly stable and isomorphic donor–acceptor stacking in a family of n-type organic semiconductors of BTBT-TCNQ derivatives", J. Mater. Chem. C 10, 16471-16479 (2022).
K. Nikaido, S. Inoue, R. Kumai, T. Higashino, S. Matsuoka, S. Arai, T. Hasegawa, "Mixing-Induced Orientational Ordering in Liquid-Crystalline Organic Semiconductors",Adv. Mater.Interfaces , 34, 72-83 (2022).
R. Miyata, S. Inoue, K. Nakajima, T. Hasegawa, ”Insulating Polymer Blend Organic Thin-Film Transistors Based on Bilayer-Type Alkylated Benzothieno[3,2-b]naphtho[2,3-b]thiophene”, ACS Appl. Mater.Interfaces 14, 17719–17726 (2022).
[2021]
S. Inoue, K. Nikaido, T. Higashino, S. Arai, M. Tanaka, R. Kumai, S. Tsuzuki, S. Horiuchi, H. Sugiyama, Y. Segawa, K. Takaba, S. Maki-Yonekura, K. Yonekura, T. Hasegawa, ”Emerging Disordered Layered-Herringbone Phase in Organic Semiconductors Unveiled by Electron Crystallography”, Chem. Mater., (2021).
S. Matsuoka, J. Tsutsumi, T. Hasegawa, ”Giant Enhancement of Excitonic Electro-optic Response in Trap-Reduced Organic Transistors”, Phys. Rev. Applied 16, 044043;1-8 (2021).
G. Kitahara, M. Ikawa, S. Matsuoka, S. Arai, T. Hasegawa, ”Approaching Trap-Minimized Polymer Thin-Film Transistors”,Adv. Funct. Mater. 2105933;1-11 (2021).
H. Matsui, E. Takahashi, S. Tsuzuki, K. Takimiya, T. Hasegawa, “Field-Induced Electron Spin Resonance of Site-Selective Carrier Accumulation in Field-Effect Transistors Composed of Organic Semiconductor Solid Solutions”, ,Phys. Rev. Applied 16,034019;1-8 (2021) .
T. Higashino, S. Inoue, S. Arai, H. Matsui, N. Toda, S. Horiuchi, R. Azumi, T. Hasegawa, ”Architecting Layered Crystalline Organic Semiconductors Based on Unsymmetric π-Extended Thienoacenes”,Chem. Mater. 33 ,7379-7385 (2021) .
Collaborated Research
T. Hayashida, Y. Uemura, K. Kimura, S. Matsuoka, M. Hagihala, S. Hirose, H. Morioka, T. Hasegawa, and T. Kimura, ”Phase transition and domain formation in ferroaxial crystals”, Phys. Rev. Mater. 5, 124409 (2021).
T. Yamaguchi, K. Iwano, T. Miyamoto, N. Takamura, N. Kida, Y. Takahashi, T. Hasegawa, H. Okamoto, ”Excitonic optical spectra and energy structures in a one-dimensional Mott insulator demonstrated by applying a many-body Wannier functions method to a charge model”, Phys. Rev. B 103, 045124 (2021).
[2020]
S. Inoue, T. Higashino, S. Arai, R. Kumai, H. Matsui, S. Tsuzuki, S. Horiuchi, and T. Hasegawa, “Regioisomeric control of layered crystallinity in solution-processable organic semiconductors”, Chem. Sci. 11, 12493 (2020).
G. Kitahara, S. Inoue, T. Higashino, M. Ikawa, T. Hayashi, S. Matsuoka, S. Arai, and T. Hasegawa, “Meniscus-controlled printing of single-crystal interfaces showing extremely sharp switching transistor operation”, Science Advances 6, eabc8847:1-10 (2020).
Y. Uemura, S. Matsuoka, J. Tsutsumi, S. Horiuchi, S. Arai, and T. Hasegawa, “Birefringent Field-Modulation Imaging of Transparent Ferroelectrics”, Phys. Rev. Appl. 14, 024060:1-8 (2020).
Y. Uemura, S. Arai, J. Tsutsumi, S. Matsuoka, H. Yamada, R. Kumai, S. Horiuchi, A. Sawa and T. Hasegawa, “Ferroelectrics field modulation imaging: A useful technique for domain and domain-wall observations”,Ferroelectrics, Volume 556, Issue 1 Pages:37-43 (2020).
T. Hayashi, Y. Hirakawa, S. Inoue, S. Arai, and T. Hasegawa, “Anomalous Hydrodynamic Size Distributions of Alkylamine/Alkylacid-Encapsulated Silver Nanocolloids: Implications for Printing Ultrafine Conductive Patterns”, ACS Appl. Nano Mater. 3, 6884-6891 (2020).
T. Hamai, S. Inoue, S. Arai, and T. Hasegawa, “Trap-state suppression and band-like transport in bilayer-type organic semiconductor ultrathin single crystals”, Phys. Rev. Mater. 4, 074601:1-8 (2020).
T. Higashino, S. Arai, S. Inoue, S. Tsuzuki, Y. Shimoi, S. Horiuchi, T. Hasegawa, R. Azumi, “Architecting layered molecular packing in substituted benzobisbenzothiophene (BBBT) semiconductor crystals”, CrystEngComm 22, 3618-3626 (2020).
S. Arai, K. Morita, J. Tsutsumi, S. Inoue, M. Tanaka, T. Hasegawa, “Layered‐Herringbone Polymorphs and Alkyl‐Chain Ordering in Molecular Bilayer Organic Semiconductors”, Adv. Funct. Mater. 30, 1906406 (2020).
Collaborated Research
Ko-ichi Hiraki, Masashi Takahashi, Toshihiro Takahashi, Tatsuo Hasegawa, Ryusuke Kondo, and Seiichi Kagoshima, ”Spin Dynamics in the Mixed Stack Charge Transfer Complex, (BEDO-TTF)(Cl2TCNQ)”, J. Phys. Soc. Jpn. 89, 074706 (2020).
Y. Kinoshita, M. Sotome, T. Miyamoto, Y. Uemura, S. Arai, S. Horiuchi, T. Hasegawa, H. Okamoto, and N. Kida, ”Observation of the Three-Dimensional Polarization Vector in Films of Organic Molecular Ferroelectrics Using Terahertz Radiation Emission”, Phys. Rev. Applied 14, 054002 (2020).
T. Hayashida, Y. Uemura, K. Kimura, S. Matsuoka, D. Morikawa, S. Hirose, K. Tsuda, T. Hasegawa, and T. Kimura, “Visualization of ferroaxial domains in an order-disorder type ferroaxial crystal”, Nature Commun. 11, 4582:1-8 (2020).
[2019]
G. Kitahara, S. Matsuoka, S. Arai, and T. Hasegawa, "Use of surface photo-reactive nanometal printing for polymer thin-film transistors: contact resistance and short-channel effects", MRS communications First View,1–5 (2019).
Y. Hirakawa, K. Aoshima, S. Arai, and T. Hasegawa, "Phase and Dispersion Stability of Silver Nanocolloids for Nanoparticle-Chemisorption Printing", ACS Appl. Nano Materials. 2,4342–4349 (2019).
T. Higashino, S. Inoue, Y. Sadamitsu, S. Arai, S. Horiuchi, and T. Hasegawa, "Bilayer-type Layered Herringbone Packing in 3-n-Octyl-9-phenyl-benzothieno[3,2-b]naphtho[2,3-b]thiophene", Chem. Lett. 48,453-456 (2019).
Y. Uemura, S. Arai, J. Tsutsumi, S. Matsuoka, H. Yamada, R. Kumai, S. Horiuchi, A. Sawa, and T. Hasegawa, "Field-Modulation Imaging of Ferroelectric Domains in Molecular Single-Crystal Films", Phys. Rev. Applied 11,014046 (2019).
Collaborated Research
T. Miyamoto, T. Kakizaki, T. Terashige, D. Hata, H. Yamakawa, T. Morimoto, N. Takamura, H. Yada, Y. Takahashi, T. Hasegawa, H. Matsuzaki, T. Tohyama, and H. Okamoto., "Biexciton in one-dimensional Mott insulators", Commun. Phys. 2, 131 , (2019).
J. Harada, Y. Kawamura, Y. Takahashi, Y. Uemura, T. Hasegawa, H. Taniguchi, K. Maruyama, "Plastic/Ferroelectric Crystals with Easily Switchable Polarization: Low-Voltage Operation, Unprecedentedly High Pyroelectric Performance, and Large Piezoelectric Effect in Polycrystalline Forms.", J. Am. Chem. Soc. 14123, 9349-9357 (2019).
[2018]
T. Hamai, S. Arai, T. Hasegawa, "Effects of tunneling-based access resistance in layered single-crystalline organic transistors", J. Mater. Res. 33, 2350-2363, (2018).
G. Kitahara, K. Aoshima, J. Tsutsumi, H. Minemawari, S. Arai and T. Hasegawa, "SuPR-NaP Technique for Printing Ultrafine Silver Electrodes and its Use for Low-Voltage Operation of Organic Thin-Film Transistors", MRS Advances, 3, 2931-2936, (2018).
S. Inoue, S. Shinamura, Y. Sadamitsu, S. Arai, S. Horiuchi, M. Yoneya, K. Takimiya, and T. Hasegawa, "Extended and Modulated Thienothiophenes for Thermally Durable and Solution-Processable Organic Semiconductors",Chem. Mater. 30,15, 5050–5060(2018).
S. Arai, S. Inoue, T. Hamai, R. Kumai, and T. Hasegawa, "Semiconductive Single Molecular Bilayers Realized Using Geometrical Frustration", Adv. Mater., 1707256:1-7 (2018).
K. Aoshima, Y. Hirakawa, T. Togashi, M. Kurihara, S. Arai, and T. Hasegawa, "Unique coexistence of dispersion stability and nanoparticle chemisorption in alkylamine/alkylacid encapsulated silver nanocolloids", Scientific Reports 8, 6133:1-9 (2018).
S. Matsuoka, J. Tsutsumi, T. Kamata, and T. Hasegawa, "Microscopic gate-modulation imaging of charge and field distribution in polycrystalline organic transistors",J. Appl. Phys. 123, 135301 (2018).
S. Matsuoka, J.Tsutsumi, H.Matsui, T. Kamata, and T.Hasegawa, "Nanosecond time-resolved microscopic gate-modulation imaging of polycrystalline organic thin-film transistors",Phys. Rev. Applied. 9, 024025 (2018).
J.Tsutsumi, S.Matsuoka, T.Kamata, T.Hasegawa, "Fast optical inspection of operations of large-area active-matrix backplane by gate modulation imaging",Org. Electron. 55, 187-193 (2018).
[2017]
T. Hamai, S. Arai, H. Minemawari, S. Inoue, R. Kumai, and T. Hasegawa, "Tunneling and Origin of Large Access Resistance in Layered-Crystal Organic Transistors", Phys. Rev. Applied, 8, 054011 (2017).
M. Yoneya, S. Matsuoka, J. Tsutsumi and T. Hasegawa, "Self-assembly of donor–acceptor semiconducting polymers in solution thin films: a molecular dynamics simulation study", J. Mater. Chem. C,5, 9602-9610 (2017).
G. Kitahara, K. Aoshima, J. Tsutsumi, H. Minemawari, S. Arai and T. Hasegawa, "Low-voltage operation of organic thin-film transistors based on ultrafine printed silver electrodes", Organic Electronics 50, 426-428 (2017).
Y. Shibata, J. Tsutsumi, S. Matsuoka, H. Minemawari, S. Arai, R. Kumai,and T. Hasegawa, "Unidirectionally Crystallized Stable n-type Organic Thin-Film Transistors Based on Solution-Processable Donor-Acceptor Compounds", Adv. Electron. Mater. 1700097 (2017).
M. Yoneya , H. Minemawari , T. Yamada, and T. Hasegawa, "Interface-Mediated Self-Assembly in Inkjet Printing of Single-Crystal Organic Semiconductor Films", J. Phys. Chem. C, 121 , (16), 8796–8803 (2017).
J. Tsutsumi, S. Matsuoka, I. Osaka, R. Kumai, and T. Hasegawa, "Reduced exchange narrowing caused by gate-induced charge carriers in high-mobility donor-acceptor copolymers", Phys. Rev. B 95, 115306 (2017).
K. Aoshima, S. Arai, K. Fukuhara, T. Yamada, and T. Hasegawa "Surface modification of printed silver electrodes for efficient carrier injection in organic thin-film transistors",Organic Electronics 41, 137 (2017).
H.Minemawari, M.Tanaka, S.Tsuzuki, S.Inoue, T.Yamada, R.Kumai, Y.Shimoi, and T.Hasegawa "Enhanced Layered-Herringbone Packing due to Long Alkyl Chain Substitution in Solution-Processable Organic Semiconductors",Chem. Mater. 29 (3), pp 1245–1254(2017).
Collaborated Research
S. Arai and H. Tanaka "Surface-assisted single-crystal formation of charged colloids",Nature Physics 13 (3), pp 503–509 (2017). (Associated link: Crystallization: Brought to the surface .)
[2016]
堤潤也、松岡悟志、長谷川達生、「ゲート変調イメージングによる有機TFTアレイの一括評価技術」,応用物理,85巻12号,1037.(2016).
S. Inoue, H. Minemawari, J. Tsutsumi, T. Hamai, S. Arai, T. Yamada, S. Horiuchi, M. Tanaka, M. Yoneya, R. Kumai and T.Hasegawa, "Molecular Requirements for Printable Organic Semiconductors in 7-Alkyl-2-phenyl[1]benzothieno[3,2-b][1]benzothiophenes (Ph-BTBT-Cn’s)",MRS Advances.1, 38. pp 2653-2658 (2016).
T. Yamada, K. Fukuhara, K. Matsuoka, H. Minemawari, J. Tsutsumi, N. Fukuda, K. Aoshima, S. Arai, Y. Makita, H. Kubo, T. Enomoto, T. Togashi, M. Kurihara, and T. Hasegawa, "Printing technique via nanoparticle chemisorption for conductive silver patterning with submicron resolution", Nature Commun. 7, 11402-1-9 (2016).
H. Koike, M. Chikamatsu, R. Azumi, J. Tsutsumi, K. Ogawa , W. Yamane, T. Nishiuchi, T. Kubo, T. Hasegawa, and K. Kanai, "Stable Delocalized Singlet Biradical Hydrocarbon for Organic Field-Effect Transistors",Adv. Funct. Mater, 26, 277 (2016).
Collaborated Research
H. Koike, J. Tsutsumi, S. Matsuoka, K. Sato, T. Hasegawa, and K. Kanai, "Electronic structure of stable n-type semiconducting molecular complex(diC8-BTBT)(TCNQ) studied by ultraviolet photoemission and inverse photoemission spectroscopy",Org. Electron.39,184.(2016).
Katelyn P. Goetz, Jun’ya Tsutsumi, Sujitra Pookpanratana, Jihua Chen, Nathan S. Corbin, Rakesh K. Behera, Veaceslav Coropceanu, Curt A. Richter, Christina A. Hacker, Tatsuo Hasegawa, and Oana D. Jurchescu, "Polymorphism in the 1:1 charge-transfer complex DBTTF-TCNQ and its effects on optical and electronic properties",Adv. Electron. Mater. 2.1600203.(2016).
H.Koike, M.Chikamatsu, R.Azumi , J.Tsutsumi , K.Ogawa , W.Yamane , T.Nishiuchi , T.Kubo , T.Hasegawa , and K.Kanai,"Stable Delocalized Singlet Biradical Hydrocarbon for Organic Field-Effect Transistors",Adv. Funct. Mater, 26, 277 (2016).
[2015]
Yuki Noda, Toshikazu Yamada, Kensuke Kobayashi, Reiji Kumai, Sachio Horiuchi, Fumitaka Kagawa and Tatsuo Hasegawa, "Few-Volt Operation of Printed Organic Ferroelectric Capacitor", Advanced Materials Vol. 27, Issue 41, Pages 6475-6481 (2015).
S. Horiuchi, Y. Noda, T. Hasegawa, F. Kagawa, and S. Ishibashi, "Correlated Proton Transfer and Ferroelectricity along Alternating Zwitterionic and Nonzwitterionic Anthranilic Acid Molecules",Chem. Mater. Vol. 27, No. 18, pp 6193–6197（2015）.
Y. Noda, H. Minemawari, H. Matsui, T. Yamada, S. Arai, T. Kajiya, M. Doi, andT. Hasegawa, "Underlying Mechanism of Inkjet Printing of Uniform Organic Semiconductor Films Through Antisolvent Crystallization",Adv. Funct. Mater. Volume 25, Issue 26, pages 4022–4031, （2015）.
J. Tsutsumi, S. Matsuoka, T. Yamada, and T. Hasegawa, ""Gate-modulation imaging of organic thin-film transistor arrays:Visualization of distributed mobility and dead pixels", Org. Electron. 25, 289-294 (2015).
S.Inoue, H.Minemawari, J.Tsutsumi, M.Chikamatsu,T.Yamada, S.Horiuchi, M.Tanaka, R.Kumai, M.Yoneya, and T.Hasegawa, "Effects of Substituted Alkyl Chain Length on Solution-Processable Layered Organic Semiconductor Crystals", Chem. Mater. 27(11), 3809-3812 (2015).
J. Tsutsumi, S. Matsuoka, S. Inoue, H. Minemawari, T. Yamada and T. Hasegawa, "N-type field-effect transistors based on layered crystalline donor-acceptor semiconductors with dialkylated benzothienobenzothiophenes as electron donors", J. Mater. Chem. C 3, 1976 (2015).
Y. Shibata, J. Tsutsumi, S. Matsuoka, K. Matsubara, Y. Yoshida, M. Chikamatsu and T. Hasegawa,"Uniaxially oriented polycrystalline thin films and air-stable n-type transistors based on donor-acceptor semiconductor (diC8BTBT)(FnTCNQ) [n = 0, 2, 4]",Appl. Phys. Lett.106.143303 (2015).
Collaborated Research
R. Singla, G.Cotugno, S.Kaiser, M.Först, M.Mitrano, H.Y.Liu, A.Cartella, C.Manzoni, H. Okamoto, T.Hasegawa, S.R.Clark, D.Jaksch, and A.Cavalleri,"THz-Frequency Modulation of the Hubbard U in an Organic Mott Insulator",Phys. Rev. Lett. 115, 187401(2015) .
Hiroyuki Yoshida, Kazuto Yamada, Jun'ya Tsutsumi, and Naoki Sato,"Complete description of ionization energy and electron affinity in organic solids: Determining contributions from electronic polarization,energy band dispersion, and molecular orientation",Phys. Rev. B 92, 075145(2015) .
T. Takeda, J. Tsutsumi, T. Hasegawa, S. Noro, T. Nakamura and T.Akutagawa,"Electron-deficient acene-based liquid crystals:dialkoxydicyanopyrazinoquinoxalines",J. Mater. Chem. C 3 3016.(2015).
[2014]
J. Tsutsumi, T. Yamada and T. Hasegawa, "Electroabsorption study of charge-transfer excited state in donor-acceptor-type polymer", Trans. Mat. Res. Soc. Japan 39, 217 (2014).
J. Tsutsumi, H. Matsuzaki, N. Kanai, T. Yamada and T. Hasegawa, "Formation of relaxed charge-transfer excitons in donor-acceptor-type polymer solar cells", Jpn. J. Appl. Phys. 53, 05HB12 (2014).
峯廻洋美、野田祐樹、山田寿一、長谷川達生、「有機半導体のダブルショット・インクジェット印刷技術」,化学工業（化学工業社）65巻 No.9、72-76 (2014).
H. Minemawari, T. Yamada and T. Hasegawa,"Crystalline film growth of TIPS-pentacene by double-shot inkjet printing technique",Jpn. J. Appl. Phys., 53, 05HC10 (2014).
H. Minemawari, J. Tsutsumi, S. Inoue, T. Yamada, R. Kumai and T. Hasegawa,"Crystal structure of asymmetric organic semiconductor 7-decyl-2-phenyl[1]benzothieno[3,2-b][1]benzothiophene",Applied Physics Express 7 091601(2014).
長谷川達生、峯廻洋美、井川光弘、野田祐樹、山田寿一、「分子性半導体の印刷製造技術」,固体物理 Vol. 49 No. 4, 205 (2014).
S. Horiuchi, K. Kobayashi, R. Kumai, and S. Ishibashi, "Ionic versus Electronic Ferroelectricity on Donor-Acceptor Molecular Sequence",Chem. Lett. (Highlight Review) 43, 26-35(2014).
堀内佐智雄「有機物による次世代強誘電体材料開発」化学工業（化学工業社） 65巻 No.1, 57-63(2014).
Collaborated Research
K.Kobayashi,S.Horiuchi,S.Ishibashi,F.Kagawa,Y.Murakami,and R.Kumai,"Structure–Property Relationship of Supramolecular Ferroelectric [H-66dmbp][Hca] Accompanied by High Polarization, Competing Structural Phases, and Polymorphs",Chemistry - A European Journal Vol.20(52),17515–17522.(2014) .
賀川史敬、堀内佐智雄「ピエゾ応答力顕微鏡を用いた有機強誘電体ドメイン構造と分極反転過程の可視化」,日本物理学会誌 第69巻No.9, p.634-638(2014).
W. Guan, N. Kida, M. Sotome, Y. Kinoshita, R. Takeda, A. Inoue, S.Horiuchi, and H. Okamoto, "Terahertz radiation by optical rectification in a hydrogen-bonded organic molecular ferroelectric crystal, 2-phenylmalondialdehyde ", Jpn. J. Appl. Phys. 53,09PD07-1-5.(2014).
M. Sotome, N. Kida, S. Horiuchi, and H. Okamoto"Visualization of ferroelectric domains in a hydrogen-bonded molecular crystal using emission of terahertz radiation", Appl. Phys. Lett. 105, 041101 (2014).
F. Kagawa, S. Horiuchi, N. Minami, S. Ishibashi, K. Kobayashi, R. Kumai,Y. Murakami, and Y. Tokura, "Polarization switching ability dependent on multidomain topology in a uniaxial organic ferroelectric", Nano Lett. 14(1), pp 239-243 (2014).
[2013]
堀内佐智雄「生体物質イミダゾールの強誘電性と反強誘電性」,パリティ vol.28 No. 9, p.51-54 (2013).
J. Tsutsumi, H. Matsuzaki, N. Kanai, T. Yamada, and T. Hasegawa, "Chargeseparation of charge-transfer excitons in donor-acceptor polymer solar cells",J. Phys. Chem. 117, 16769 (2013).
Y. Noda, H. Matsui, H. Minemawari, T. Yamada, and T. Hasegawa, ”Observation and simulation of microdroplet shapes on surface-energy-patterned substrates: Contact line engineering for printed electronics",J. Appl. Phys. 114, 044905 (2013).
長谷川達生「有機半導体の印刷製造技術」,応用物理 第82巻 No. 6, p.493-496 (2013).
S. Horiuchi, R. Kumai, Y. Tokura, "High-Temperature and Pressure-Induced Ferroelectricity in Hydrogen-Bonded Supramolecular Crystals of Anilic Acids and 2,3-Di(2-pyridinyl)pyrazine", J. Am. Chem. Soc. 135(11), 4492-4500 (2013).
Collaborated Research
T. Miyamoto, K. Kimura, T. Hamamoto, H. Uemura, H. Yada, H. Matsuzaki, S.Horiuchi, and H. Okamoto, "Measurement of a Photoinduced Transition from a Nonordered Phase to a Transient Ordered Phase in the Organic Quantum-Paraelectric Compound dimethyltetrathiafulvalene dichlorodibromo-p-benzoquinone Using Femtosecond Laser Irradiation", Phys. Rev. Lett. 111, 187801 (2013).
K. Shibuya, J. Tsutsumi, T. Hasegawa, and A. Sawa, "Fabrication and Raman scattering study of epitaxial VO2 films on MgF2 (001) substrates", Appl. Phys. Lett. 103, 021604 (2013).
R. Sawada, H. Uemura, M. Sotome, H. Yada, N. Kida, K. Iwano, Y.Shimoi, S. Horiuchi, H. Okamoto, "Large second-order optical nonlinearity in a ferroelectric molecular crystal of croconic acid with strong intermolecular hydrogen bondsAppl", Appl. Phys. Lett. 102(16), 162901-1-4 (2013).
熊井玲児、賀川史敬、堀内佐智雄「超分子強誘電体フェナジンークロラニル酸の逐次相転移と強誘電ドメイン状態」, 日本結晶学会誌 第55巻 No. 2, p.135-141 (2013).
[2012]
S. Horiuchi, F. Kagawa, K. Hatahara, K. Kobayashi, R. Kumai, Y. Murakami,Y. Tokura, "Above-room-temperature ferroelectricity and antiferroelectricity in benzimidazoles", Nat. Commun. 3:1308 doi: 10.1038/ncomms2322 (2012).
J. Tsutsumi, H. Matsui, T. Yamada, R. Kumai, and T. Hasegawa, "Generation and Diffusion of Photocarriers in Molecular Donor-Acceptor Systems: Dependence on Charge-Transfer Gap Energy", J. Phys. Chem. C 116, 23957-23964 (2012).
Hiroyuki Matsui , Yuki Noda , and Tatsuo Hasegawa , "Hybrid Energy-Minimization Simulation of Equilibrium Droplet Shapes on Hydrophilic/Hydrophobic Patterned Surfaces ", Langmuir, 28 (44), pp 15450-15453,(2012).
M. Ikawa, T. Yamada, H. Matsui, H. Minemawari, J. Tsutsumi, Y. Horii, M. Chikamatsu, R. Azumi, R. Kumai, and T. Hasegawa, "Simple push coating of polymer thin-film transistors", Nat. Commun. 3:1176 doi: 10.1038/ncomms2190 (2012).
長谷川達生、松井弘之、ミシェンコ アンドレイ「有機半導体界面における浅い局在状態密度分布のスペクトル解析」, 日本物理学会誌 第67巻 No. 10, p.695-699 (2012).
松井弘之、長谷川達生「有機半導体における2 種類の運動による尖鋭化効果」, 電子スピンサイエンス学会誌 第10巻 Autumn Issue (19号) p82-87 (2012).
長谷川達生、峯廻洋美、山田寿一「ダブルショット・インクジェット印刷による有機半導体の製造」, 未来材料 第12巻 No. 6, p.55-60 (2012).
K. Kobayashi, S. Horiuchi, R. Kumai, F. Kagawa, Y. Murakami, Y. Tokura, "Electronic Ferroelectricity in a Molecular Crystal with Large Polarization Directing Antiparallel to Ionic Displacement", Phys. Rev. Lett. 108, 237601,(2012).
H. Matsui, D. Kumaki, E. Takahashi, K. Takimiya, S. Tokito, and T. Hasegawa , "Correlation between interdomain carrier hopping and apparent mobility in polycrystalline organic transistors as investigated by electron spin resonance ", Phys. Rev. B 85.035308 (2012).
R. Kumai, S. Horiuchi, J. Fujioka, and Y. Tokura , "Ferroelectricity and Pressure-Induced Phenomena Driven by Neutral Ionic Valence Instability of Acid-Base Supramolecules", J. Am. Chem. Soc. 134(2), 1036-1046 (2012).
Collaborated Research
小林賢介，熊井玲児，堀内佐智雄, 「有機結晶の電子型強誘電性」,固体物理 47巻 No.12, 757 (2012).
F. Kagawa, K. Hatahara, S. Horiuchi, Y. Tokura, "Domain-wall dynamics coupled to proton motion in a hydrogen-bonded organic ferroelectric", Phys. Rev. B 85 ,220101(R) (2012) (Editor's Suggestion) .
S. Ishibashi, S. Horiuchi, R. Kumai, K. Terakura, "First-principles calculations of spontaneous polarization for TTF-QBrCl3", Physica Status Solidi B. , Vol. 249, 1008-1011 (2012).
H. Minemawari, J. Fe F. Jose, Y. Takahashi, T. Naito & T. Inabe, "Structual Characteristics in a Stable Metallic ET Salt with Unusually High Oxidation State (ET:Bis(ethylenedithio)tetrathiafulvalene)", Bull. Chem. Soc. Jpn. , Vol. 85, 335-340 ( 2012).
Andrey S. Mishchenko, Hiroyuki Matsui, and Tatsuo Hasegawa , "Distribution of localized states from fine analysis of electron spin resonance spectra of organic semiconductors: Physical meaning and methodology", Phys. Rev. B 85.085211 (2012).
[2011]
堀内佐智雄, 「有機分子を用いた超室温・高性能強誘電体」, 未来材料 12巻 No.1 28 (2011).
堤潤也、長谷川達生, 「有機半導体における分子間電荷移動励起を用いた光電変換」, 固体物理 46巻 No. 6, 309 (2011).
H. Minemawari, T. Yamada, H. Matsui, J. Tsutsumi, S. Haas, R. Chiba, R. Kumai & T. Hasegawa , "Inkjet printing of single-crystal films", Nature , 475, 364-367 ( 2011).
堀内佐智雄, 「有機分子性結晶の強誘電性」, Mol. Sci. 5, A0041 (2011).
S. Horiuchi, R. Kumai, and Y. Tokura, "Hydrogen-Bonding Molecular Chains for High-Temperature Ferroelectricity", Adv. Mater. 23, 2098 (2011).
Collaborated Research
M. Ohkura, Y. Ishige, R. Sawada, H. Matsuzaki,*, Y. Nogami, H. Nishikawa, M. Yamashita, S. Horiuchi, and H. Okamoto, "Optical and structural studies of a two-dimensional organic Mott insulator dimethylphenazine-tetrafluorotetracyanoquinodimethane", Phys. Rev. B 84, 085136 (2011).
A. Stroppa, D. Di Sante, S. Horiuchi, Y. Tokura, D. Vanderbilt, S. Picozzi, "Polar distortions in hydrogen-bonded organic ferroelectrics", Phys. Rev. B 84, 014101 (2011).
S. Wall, D. Brida, S. R. Clark, H. P. Ehrke, D. Jaksch, A. Ardavan, S. Bonora, H.Uemura, Y. Takahashi, T. Hasegawa, H. Okamoto, G. Cerullo A. Cavalleri, "Quantum interference between charge excitation paths in a solid-state Mott insulator", Nature Physics Volume: 7 Pages: 114-118 (2011).
Shoichi Tao, Hiroyuki Matsuzaki, Hirotaka Uemura, Hiroyuki Yada, Takafumi Uemura,Jun Takeya, Tatsuo Hasegawa, and Hiroshi Okamoto, "Optical pump-probe spectroscopy of photocarriers in rubrene single crystals", Phys. Rev. B 83, 075204 (2011).
K. Ishizaka, M. S. Bahramy, H. Murakawa, M. Sakano, T. Shimojima,T. Sonobe, K. Koizumi, S. Shin, H. Miyahara, A. Kimura, K. Miyamoto, T. Okuda, H. Namatame, M. Taniguchi, R. Arita, N. Nagaosa, K. Kobayashi, Y. Murakami, R. Kumai, Y. Kaneko, Y. Onose, and Y. Tokura, "Giant Rashba-type spin splitting in bulk BiTeI", Nature Mat. 10, 521-526 (2011).
M. Uchida, K. Ishizaka, P. Hansmann, Y. Kaneko, Y. Ishida, X. Yang, R. Kumai, A. Toschi, Y. Onose, R. Arita, K. Held, O. K. Andersen, S. Shin, and Y. Tokura, "Pseudogap of Metallic Layered Nickelate R2-xSrxNiO4 (R=Nd,Eu) Crystals Measured Using Angle-Resolved Photoemission Spectroscopy", Phys. Rev. Lett. 106, 027001-1-027001-4 (2011).
[2010]
H. Matsui, A. S. Mishchenko, and T. Hasegawa, "Distribution of Localized States from Fine Analysis of Electron Spin Resonance Spectra in Organic Transistors", Phys. Rev. Lett. 104, 056602 (2010).
S. Horiuchi, Y. Tokunaga, G. Giovannetti, S. Picozzi, H. Itoh, R. Shimano, R. Kumai, Y. Tokura, "Above-room-temperature ferroelectricity in a single-component molecular crystal", Nature 463, 789-792 (11 February 2010).
T. Hasegawa, M. Hiraoka, T. Yamada, "Double-shot inkjet printing of donor-acceptor-type organic charge-transfer complexes: Wet/nonwet definition and its use for contact engineering ", Thin Sol. Films 518, 14, 3988 (2010).
堀内佐智雄，十倉好紀, 「超室温、高分極の有機強誘電体クロコン酸」, 固体 物理 45巻 No.3, 149 (2010).
S. Horiuchi, R. Kumai, J. Fujioka, Y. Tokura, "Supramolecular approach to organic ferroelectrics", Physica B 405, S334 (2010).
T. Yamada, R. Kumai, Y. Takahashi, and T. Hasegawa, "High performance organic thin-film transistors based on hexamethylenetetrathiafulvalene lying flat-on-surface with non-layered packing motif", J. Mater. Chem. 20, 5810-5812 (2010).
S. Haas, H. Matsui, and T. Hasegawa, "Field-modulation spectroscopy of pentacene thin films using field-effect devices: Reconsideration of the excitonic structure", Phys. Rev. B 82, 161301(R) (2010).
J. Tsutsumi, T. Yamada, H. Matsui, S. Haas, and T. Hasegawa, "Competition between Charge-Transfer Exciton Dissociation and Direct Photocarrier Generation in Molecular Donor-Acceptor Compounds", Phys. Rev. Lett. 105, 226601 (2010).
Collaborated Research
J. S. Lee, M. Nakamura, D. Okuyama, R. Kumai, T. Arima, M. Kawasaki, and Y. Tokura, "Competing electronic orders in anisotropically strained (Pr0.6Ca0.4)1-x (La0.6Sr0.4)xMnO3 thin films", Phys. Rev. B 82, 052406-1-052406-4(2010).
M. Nakamura, D. Okuyama, J. S. Lee, T. Arima, Y. Wakabatashi, R. Kumai, M. Kawasaki, and Y. Tokura, "Magnetically Tunable Metal-Insulator Superlattices", Adv. Mater. 22, 500-504(2010).
F. Kagawa, S. Horiuchi, M. Tokunaga, J. Fujioka, and Y. Tokura, "Ferroelectricity in a one-dimensional organic quantum magnet", Nat. Phys. 6, 169 (2010).
S. Ishibashi, K. Terakura, S. Horiuchi, "First-principles electronic-structure study for organic ferroelectric tetrathiafulvalene-p-bromanil (TTF-BA)", J. Phys. Soc. Jpn. 79, 043703 (2010).
F. Iwase, K. Miyagawa, K. Kanoda, S. Horiuchi, Y. Tokura, "Charge-lattice-coupled quantum fluctuations in DMTTF-2,6-QBr2Cl2", J. Phys. Soc. Jpn. 79, 043709 (2010) (Papers of Editors' Choice) .
W. L. Kalb, S. Haas, C. Krellner, T. Mathis, B. Batlogg, "rap density of states in small-molecule organic semiconductors: A quantitative comparison of thin-film transistors with single crystals", Phys. Rev. B 81, 155315 (2010) .
M. Kraus, S. Richler, A. Opitz, W. Brutting, S. Haas, T. Hasegawa, A. Hinderhofer, F. Schreiber, "High-mobility copper-phthalocyanine field-effect transistors with tetratetracontane passivation layer and organic metal contacts", J. Appl. Phys. 107, 094503 (2010) .
F. Kagawa, S. Horiuchi, H. Matsui, R. Kumai, Y. Onose, T. Hasegawa, Y. Tokura, "Electric-field control of solitons in a ferroelectric organic charge-transfer salt", Phys. Rev. Lett. 104, 227602 (2010) .
S.Seki, T.Kurumaji, S.Ishiwata, H.Matsui, H.Murakawa, Y.Tokunaga, Y.Kaneko, T.Hasegawa, Y. Tokura, "Cupric chloride CuCl2 as an S=1/2 chain multiferroic", Phys. Rev. B 82,064424 (2010) .
[2009]
Y. Tomioka, R. Kumai, T. Ito, and Y. Tokura, "Magnetic and electronic properties of Eu1-xSrxMnO3 (0.3<x<0.7) single crystals", Phys. Rev. B 80, 174414-1-174414-8(2009).
M. Matsubara, Y. Kaneko, J. P. He, H. Okamoto, and Y. Tokura, "Ultrafast polarization and magnetization response of multiferroic GaFeO3 using time-resolved nonlinear optical techniques", Phys. Rev. B 79, 140411(R) (2009).
M. Matsubara, Y. Shimada, K. Ohgushi, T. Arima, and Y. Tokura, "Resonant x-ray magnetoelectric effect in a centrosymmetric spinel oxide", Phys. Rev. B 79, 180407(R) (2009).
M. Matsubara, Y. Kaneko, J. P. He, H. Okamoto, and Y. Tokura, "Ultrafast polarization and magnetization dynamics in a multiferroic GaFeO3", J. Phys. Conf. Ser. 148, 012015 (2009).
M. Matsubara, T. Ogasawara, Y. Tomioka, K. Tobe, H. Okamoto, and Y. Tokura, "A Key for Photoinduced Insulator-Metal Transitions in Manganites: Lattice Constant Matching between Charge/Orbital Ordered Insulator and Ferromagnetic Metal", J. Phys. Soc. Jpn. 78, 023707 (2009).
R. Kumai, N. Takeshita, T. Ito, H. Kito, A. Iyo, and H. Eisaki, "Pressure-Induced Modification of Crystal Structure in NdFeAsO1-y (1-y=0.85), Accompanied by Remarkable Suppression of Tc", J. Phys. Soc. Jpn. 78, 013705 (2009).
S. Horiuchi, R. Kumai, and Y. Tokura, "Proton-displacive ferroelectricity in neutral cocrystals of anilic acids with phenazine", J. Mater. Chem. 19, 4421-4434 (2009).
S. Haas, T. Takahashi, K. Takimiya, T. Hasegawa, "High-performance dinaphtho-thieno-thiophene single crystal field-effect transistors", Appl. Phys. Lett. 95, 022111 (2009).
H.Matsui and T.Hasegawa, "Direct Observation of Field-Induced Carrier Dynamics in Pentacene Thin-Film Transistors by ESR Spectroscopy", Jpn. J. Appl. Phys. 48, 04C175 (2009).
H.Matsui and T.Hasegawa, "Field-Induced ESR Spectroscopy on Rubrene Single-Crystal Field-Effect Transistors", Mater. Res. Soc. Symp. Proc. 1154, B08-04 (2009).
T.Hasegawa and J.Takeya, "Organic field-effect transistors using single crystals", Sci. Technol. Adv. Mater. 10, 024314 (2009).
H.Matsui and T.Hasegawa, "Visualization of accumulated charge density in operating organic thin-film transistors", Appl. Phys. Lett. 95, 223301 (2009).
M.Hiraoka, T.Yamada and T.Hasegawa, "Bias stress and condensation of mobile trap agents in printed organic transistors", Appl. Phys. Lett. 95, 223304 (2009).
Collaborated Research
D. Okuyama, M. Nakamura, Y. Wakabayashi, H. Ito, R. Kumai, H. Yamada, Y. Taguchi, T. Arima, M. Kawasaki, and Y. Tokura, "Epitaxial-strain effect on chage/orbital order in Pr0.5Ca0.5MnO3 films", Appl. Phys. Lett. 95, 152502-1-152502-3 (2009).
H. Nakamura, H. Tomita, H. Akimoto, R. Matsumura, I. H. Inoue, T. Hasegawa, K. Kono, Y. Tokura, and H. Takagi, "Tuning of Metal-Insulator Transition of Quasi-Two-Dimensional Electrons at Parylene/SrTiO3 Interface by Electric Field", J. Phys. Soc. Jpn 78, No.8, p.083713 (2009).
H. Matsuzaki, H. Uemura, M. Matsubara, T. Kimura, Y. Tokura, and H. Okamoto, "Detecting charge and lattice dynamics in photoinduced charge-order melting in perovskite-type manganites using a 30-femtosecond time resolution", Phys. Rev. B 79, 235131 (2009).
J. Fujioka, S. Horiuchi, F. Kagawa, and Y. Tokura, "Dynamical disorder of π-molecular structures induced by proton dynamics in an organic ferroelectric compound", Phys. Rev. Lett. 102, 197601 (2009).
J. Fujioka, S. Horiuchi, N. Kida, R. Shimano, and Y. Tokura, "Anisotropic polarization-π-molecular-skeleton coupled dynamics in proton-displacive organic ferroelectrics", Phys. Rev. B 80, 125134 (2009).
D. Okuyama. Y. Tokunaga, R. Kumai, Y. Taguchi, T. Arima, and Y. Tokura, "Lattice-form-dependent orbital shape and charge disproportionation in charge- and orbital-ordered manganites", Phys. Rev. B 80, 064402-1-064402-8 (2009).
T. Akutagawa, H. Koshinaka, D. Sato, S. Takeda, S. Noro, Y. Takahashi, R. Kumai, and Y. Tokura, "Ferroelectricity and polarity control in solid-state flip-flop supramolecular rotators", Nature Mat. 8, 342 - 347 (2009).
P.M. Shirage, K. Miyazawa, M. Ishikado, K. Kihou, C.H. Lee, N. Takeshita, H. Matsuhata, R. Kumai, Y. Tomioka, T. Ito, H. Kito, H. Eisaki, S. Shamoto, A. Iyo, "High-pressure synthesis and physical properties of new iron (nickel)-based superconductors", Physica C 469, 355-369 (2009).
[2008]
T. Yamada, T. Hasegawa, M. Hiraoka, H. Matsui, Y. Tokura, and G. Saito, "Control of film morphology and its effects on subthreshold characteristics in dibenzotetrathiafulvalene organic thin-film transistors", Appl. Phys. Lett. 92, 233306 (2008).
H. Matsui, T. Hasegawa, Y. Tokura, M. Hiraoka, and T. Yamada, "Polaron Motional Narrowing of Electron Spin Resonance in Organic Transistors", Phys. Rev. Lett. 100, 126601 (2008).
長谷川達生，松井弘之、「有機トランジスタの電子スピン共鳴スペクトルにおける尖鋭化効果」、固体物理 43巻, No.6, 351 (2008).
S. Horiuchi and Y.Tokura, "Organic Ferroelectrics", Nat. Mater. 7, 357 (2008).
M. Matsubara, Y. Okimoto, T. Ogasawara, S. Iwai, Y. Tomioka, H. Okamoto, and Y. Tokura, "Photoinduced switching between charge and orbital ordered insulator and ferromagnetic metal in perovskite manganites", Phys. Rev. B 77, 094410 (2008).
M. Matsubara, Y. Okimoto, T. Ogasawara, Y. Tomioka, H. Okamoto, and Y. Tokura, "Ultrafast photoinduced ferromagnetism in the perovskite manganite Gd0.55Sr0.45MnO3", J. Appl. Phys. 103, 07B110 (2008).
S. Horiuchi, R. Kumai, Y. Tokunaga, and Y. Tokura, "Proton dynamics and room-temperature ferroelectricity in anilate salts with a proton sponge", J. Am. Chem. Soc. 130, 13382 (2008).
Collaborated Research
Y. Tokunaga, T. J. Sato, M. Uchida, R. Kumai, Y. Matsui, T. Arima, and Y. Tokura, "Versatile and competing spin-charge-orbital orders in the bilayered manganite system Pr(Sr1-yCay)2Mn2O7", Phys. Rev. B 77, 064428 (2008).
M. Konoto, T. Yamada, K. Koike, H. Akoh, T. Arima, and Y. Tokura, "Formation and control of magnetic vortex chirality in patterned micromagnet arrays", J. Appl. Phys. 103, 023904 (2008).
F. Iwase, K. Miyagawa, K. Kanoda, S. Horiuchi, and Y. Tokura, "NQR study of neutral-ionic phase transition and quantum paraelectric state in organic charge-transfer complexes", Solid State Sciences 10, 1752 (2008).
Y. Kubozono, S. Haas, W. L. Kalb, P. Joris, F. Meng, A. Fujiwara, B.Batlogg, "High-performance C60 thin-film field-effect transistors with parylene gate insulator", Appl. Phys. Lett. 93, 033316 (2008).
Y.Krockenberger, H.Matsui, T.Hasegawa, M.Kawasaki, and Y.Tokura, "Solid Phase Epitaxy of Ferrimagnetic Y3Fe5O12 Garnet Thin Films", Appl. Phys. Lett. 93, 092505 (2008).
[2007]
M. Hiraoka, T. Hasegawa, T. Yamada, Y. Takahashi, S. Horiuchi, and Y. Tokura, "On-Substrate Synthesis of Molecular Conductor Films and Circuits", Adv. Mater. 19, 3248 (2007).
Y. Takahashi, T. Hasegawa, S. Horiuchi, R. Kumai, Y. Tokura, and G. Saito, "High mobility Organic Field-Effect Transistor Based on Hexamethylenetetrathiafulvalene with Organic Metal Electrodes", Chem. Mater. 19, 6382 (2007).
堀内佐智雄、熊井玲児、十倉好紀「水素結合型超分子を用いた有機強誘電体」、固体物理 42巻, No.5, 283 (2007).
R. Kumai, S. Horiuchi, H. Sagayama, T. Arima, M. Watanabe, Y. Noda, and Y. Tokura, "Structural Assignment of Polarization in Hydrogen-Bonded Supramolecular Ferroelectrics", J. Am. Chem. Soc. 129, 12920 (2007).
S. Horiuchi, R.Kumai, and Y.Tokura, "Hydrogen-Bonded Donor-Acceptor Compounds for Organic Ferroelectric Materials", Chem. Commun., 2321 (2007).
S. Horiuchi, R. Kumai, and Y. Tokura, "A Supramolecular Ferroelectric Realized by Collective Proton Transfer", Angew. Chem Int. Ed. 46, 3497 (2007).
H. Okamoto, H. Matsuzaki, T. Wakabayashi, Y. Takahashi, and T. Hasegawa, "Photoinduced Metallic State Mediated by Spin-Charge Separation in a One-Dimensional Organic Mott Insulator", Phys. Rev. Lett. 98, 037401 (2007).
M. Matsubara, Y. Okimoto, T. Ogasawara, Y. Tomioka, H. Okamoto, and Y. Tokura, "Ultrafast Photoinduced Insulator-Ferromagnet Transition in the Perovskite Manganite Gd[sub 0.55]Sr[sub 0.45]MnO[sub 3]", Phys. Rev. Lett. 99, 207401 (2007).
S. Tomimoto, M. Matsubara, T. Ogasawara, H. Okamoto, T. Kimura, and Y. Tokura, "Photoinduced Metallic State Mediated by Spin-Charge Separation in a One-Dimensional Organic Mott Insulator ", Phys. Rev. Lett. 98, 017402 (2007).
小笠原 剛, 岡本 博, 十倉 好紀「フェムト秒超短パルス光照射による強磁性スピンダイナミクス」 、固体物理 42巻, No.3, 19 (2007).
Y. Okimoto, H. Matsuzaki, Y. Tomioka, I. Kezsmarki, T. Ogasawara, M.Matsubara, H. Okamoto, and Y. Tokura,"Ultrafast Photoinduced Formation of Metallic State in a Perovskite-type Manganite with Short Range Charge and Orbital Order" , J. Phys. Soc. Jpn. 76, 043702 (2007).
Collaborated Research
K. Yonemitsu, N. Maeshima, and T. Hasegawa, "Suppression of Rectification at Metal-Mott Insulator Interfaces", Phys. Rev. B 76, 235118 (2007).
M. H. Lemee-Cailleau, E. Collet, M. Buron-Le Cointe, N. Grach, B. Ouladdiaf, F. Moussa, T. Hasegawa, Y. Takahashi, T. Roisnel, and H. Cailleau, "Down to the Quantum Limit at the Neutral-to-Ionic Phase Transition of (BEDT-TTF)(ClMe-TCNQ) - Symmetry Analysis and Phase Diagram", J. Phys. Chem. B 111, 6167 (2007).
H. Sakai, K. Ito, R. Kumai, and Y. Tokura, "Fe-Doping Induced Evolution of Charge-Orbital Ordering in a Bicritical-State Manganite", Phys. Rev. B 76, 155112 (2007).
S. Miyasaka, T. Yasue, J. Fujioka, Y. Yamasaki, Y. Okimoto, R. Kumai, T. Arima, and Y. Tokura, "Magnetic Field Switching Between the Two Orbital-Ordered States in DyVO3", Phys. Rev. Lett. 99, 217201 (2007).
S. Tao, T. Miyagoe, A. Maeda, H. Matsuzaki, H. Ohtsu, M. Hasegawa, S. Takaishi, M. Yamashita, and H. Okamoto, "Ultrafast Optical Switching by using Nanocrystals of a Halogen-Bridged Nickel-Chain Compound Dispersed in an Optical Polymer", Adv. Mater. 19, 2707 (2007).
S. Iwai, K. Yamamoto, A. Kashiwazaki, F. Hiramatsu, H. Nakaya, K. Yakushi, H. Okamoto, H. Mori, and Y. Nishio, "Photoinduced Melting of a Stripe-Type Charge-Order and Metallic Domain Formation in a Layered BEDT-TTF-Based Organic Salt", Phys. Rev. Lett. 98, 097402 (2007).
Y. Okimoto, H. Matsuzaki, Y. Tomioka, I. Kezsmarki, T. Ogasawara, M.Matsubara, H. Okamoto, and Y. Tokura,"Ultrafast Photoinduced Formation of Metallic State in a Perovskite-type Manganite with Short Range Charge and Orbital Order", J. Phys. Soc. Jpn. 76, 043702 (2007).
[2006]
M. Hiraoka, T. Hasegawa, Y. Abe, T. Yamada, Y.Tokura, H. Yamochi, G. Saito, T. Akutagawa, and T. Nakamura, "Inkjet Printing of Organic Metal Electrodes Using Charge-Transfer Compounds", Appl. Phys. Lett. 89, 173504 (2006).
Y. Takahashi, T. Hasegawa, Y. Abe, Y. Tokura, and G. Saito, "Organic Metal Electrodes for Controlled P- and N-type Carrier Injections in Organic Field-Effect Transistors", Appl. Phys. Lett. 88, 073504 (2006).
R. Kumai, S. Horiuchi, Y. Okimoto, and Y. Tokura, "Large Dielectric Susceptibility Associated with Proton Transfer in a Supramolecular Structure of Chloranilic Acid and 5,5'-dimethyl-2,2'-bipyridine", J. Chem. Phys. 125, 084715 (2006).
S. Horiuchi, T.Hasegawa, and Y.Tokura, "Molecular Donor-Acceptor Compounds as Prospective Organic Electronics Materials", J. Phys. Soc. Jpn. 75, 051016 (2006).
S. Horiuchi, R. Kumai, Y. Okimoto, and Y. Tokura, "Chemical Approach to Neutral-Ionic Valence Instability, Quantum Phase Transition, and Relaxor Ferroelectricity in Organic Charge-Transfer Complexes", Chem. Phys. 325, 78 (2006).
H. Okamoto, K. Ikegami, T. Wakabayashi, Y. Ishige, J. Togo, H. Kishida, and H. Matsuzaki, "Ultrafast Photoinduced Melting of a Spin-Peierls Phase in an Organic Charge-Transfer Compound, K-Tetracyanoquinodimethane", Phys. Rev. Lett. 96, 037405 (2006).
S. Iwai, Y. Ishige, S. Tanaka, Y. Okimoto, Y. Tokura, and H. Okamoto, "Coherent Control of Charge and Lattice Dynamics in a Photoinduced Neutral-to-Ionic Transition of a Charge-Transfer Compound", Phys. Rev. Lett. 96, 047503 (2006).
S. Iwai and H. Okamoto, "Ultrafast Phase Control in One-Dimensional Correlated Electron Systems ", J. Phys. Soc. Jpn. 75, 11007 (2006).
T. Ogasawara, K. Ohgushi, H. Okamoto, and Y.Tokura,"Photoinduced Dynamics of Sublattice Magnetization in Ferrimagnets:FeCr2S4and CoCr2S4" , J. Phys. Soc. Jpn. 75, 083707 (2006).
Collaborated Research
H. Nakamura, H. Takagi, I. H. Inoue, Y. Takahashi, T. Hasegawa, and Y. Tokura, "Low temperature metallic state induced by electrostatic carrier doping of SrTiO3", Appl. Phys. Lett. 89, 133504 (2006).
K. Sakai, T. Hasegawa, M. Ichikawa, and Y. Taniguchi, "Field-effect Characteristics of a One-dimensional Platinum Chain Compound, Bis(1,2-benzoquinonedioximato)platinum(II)", Chem. Lett. 35, 302 (2006).
Y. Shimada, S. Miyasaka, R. Kumai, and Y. Tokura, "Semiconducting Ferromagnetic States in La1-xSr1+xCoO4", Phys. Rev. B 73, 134424 (2006).
Y. Tokunaga, T. Lottermoser, Y. Lee, R. Kumai, M. Uchida, T. Arima, and Y. Tokura, "Rotation of Orbital Stripes and the Consequent Charge-Polarized State in Bilayer Manganites", Nat. Mater. 5, 937 (2006).
M. Uchida, R. Mathieu, J. P. He, Y. Kaneko, A. Asamitsu, R. Kumai, Y. Tomioka, Y. Matsui, and Y. Tokura, "Effect of Quenched Disorder on Charge-Orbital-Spin Ordering in Single-Layer Manganites", J. Phys. Soc. Jpn. 75, 053602 (2006).
R. Mathieu, M. Uchida, Y. Kaneko, J. P. He, X. Z. Yu, R. Kumai, T. Arima, Y. Tomioka, A. Asamitsu, Y. Matsui, and Y. Tokura, "Bandwidth-Disorder Phase Diagram of Half-Doped Layered Manganites", Phys, Rev. B. 74, 020404 (2006).
A. Maeda, S. Matsumoto, H. Kishida, T. Takenobu, Y. Iwasa, H. Shimoda, O. Zhou, M. Shiraishi, and H. Okamoto, "Gigantic Optical Stark Effect and Ultrafast Relaxation of Excitons in Single-Walled Carbon Nanotubes", J. Phys. Soc. Jpn. 75, 43709 (2006).
H. Odaka, Y. Okimoto, T. Yamada, H. Okamoto, M. Kawasaki, and Y. Tokura, "Control of magnetic-field effect on electroluminescence in Alq-based organic light emitting diodes", Appl. Phys. Lett. 88, 123501 (2006).
M. Ohtani, H. Kishida. K. Hirota, H. Sakurada, N. Kawamoto, Y. Murakami, K.Ueno, J. Matsuno, Y. Okimoto, T. Makino, Y. Segawa, Y. Tokura, D. Shindo, H.Okamoto, and M. Kawasaki,"Sr2TM O3(TM = Ni,Co) Compounds with 1D TM-O Chains" , Adv. Mater. 18, 2541 (2006).
H. Matsuzaki, M. Yamashita and H. Okamoto,"Ultrafast Photoconversion from Charge Density Wave State to Mott-HubbardState in One-Dimensional Extended Peierls-Hubbard System of Br-Bridged Pd Compound" , J. Phys. Soc. Jpn. 75, 123701 (2006).
[2005]
Y. Takahashi, T. Hasegawa, Y. Abe, Y. Tokura, K. Nishimura, and G. Saito, "Tuning of Electron Injections for n-type Organic Transistor Based on Charge-Transfer Compounds", Appl. Phys. Lett. 86, 063504 (2005).
Y. Abe, T. Hasegawa, Y. Takahashi, T. Yamada, and Y. Tokura, "Control of Threshold Voltage in Pentacene Thin-Film Transistors Using Carrier Doping at the Charge-Transfer Interface with Organic Acceptors", Appl. Phys. Lett. 87, 153506 (2005).
T. Hasegawa, R. Kumai, Y. Takahashi, Y. Tokura, and H. Sawa, "Clamp-Type Pressure Cell for Full Structure Determination of Molecular Single Crystals up to 1.5 GPa", Rev. Sci. Instru. 76, 073903 (2005).
S. Horiuchi, R. Kumai, and Y. Tokura, "Room-Temperature Ferroelectricity and Gigantic Dielectric Susceptibility on a Supramolecular Architechture of Phenazine and Deuterated Chloranilic Acid", J. Am. Chem. Soc. 127, 5010 (2005).
S. Horiuchi, F. Ishii, R. Kumai, Y. Okimoto, H. Tachibana, N. Nagaosa, and Y. Tokura, "Ferroelectricity Near Room Temperature in Co-Crystals of Nonpolar Organic Molecules", Nat. Mater. 4, 163 (2005).
Y. Okimoto, R. Kumai, S. Horiuchi, Y. Okamoto, and Y. Tokura, "Quantum Neutral-Ionic Phase Transition as Investigated by Raman Scattering and X-ray Diffraction", J. Phys. Soc. Jpn. 74, 2165 (2005).
T. Ogasawara, K. Ohgushi, Y. Tomioka, K. S. Takahashi, H. Okamoto, M. Kawasaki, and Y. Tokura, "General Features of Photoinduced Spin Dynamics in Ferromagnetic and Ferrimagnetic Compounds", Phys. Rev. Lett. 94, 087202 (2005).
Collaborated Research
R Mathieu, A. Asamitsu, Y. Kaneko, J. P. He, X. Z. Yu, R. Kumai, Y. Onose, N. Takeshita, T. Arima, H. Takagi, and Y. Tokura, "Impurity-Induced Transition to a Mott Insulator in Sr3Ru2O7", Phys. Rev. B 72, 092404 (2005).
N. Kida, T. Yamada, M. Konoto, Y. Okimoto, T. Arima, K. Koike, H. Akoh, and Y. Tokura, "Optical Magnetoelectric Effect in a Submicron Patterned Magnet", Phys. Rev. Lett. 94, 77205 (2005).
十倉好紀、岡本 博 「強相関系の光応答」, 「光科学研究の最前線」 強光子場科学研究懇談会 192 (2005).
H. Matsuzaki, H. Takamatsu, H. Kishida, and H. Okamoto,"Valence Fluctuation and Domain-Wall Dynamics in Pressure-Induced Neutral-to-Ionic Phase Transition of Organic Charge-Transfer Crystal" , J. Phys. Soc. Jpn. 74, 2925 (2005).
[2004]
T. Hasegawa, K. Mattenberger, J. Takeya, and B. Batlogg, "Ambipolar Field-Effect Carrier Injections in Organic Mott Insulators", Phys. Rev. B 69, 245115 (2004).
長谷川 達生、「有機モット絶縁体におけるFET効果」、固体物理 39巻, 153 (2004).
Y. Okimoto, R. Kumai, E. Saitoh, M. Izumi, S. Horiuchi, and Y. Tokura, "Spectroscopic Study on Stripe Pattern Formation upon Current Injection in a Charge-Transfer Complex", Phys. Rev. B 70, 115104 (2004).
H. Okamoto, Y. Ishige, S. Tanaka, H. Kishida, S. Iwai, and Y. Tokura, "Photoinduced phase transition in tetrathiafulvalene-p-chloranil observed in femtosecond reflection spectroscopy",Phys. Rev. B 70, 165202 (2004).
Tomimoto, S. Miyasaka, T. Ogasawara, H. Okamoto, and Y. Tokura,"Photoinduced melting of the orbital order in a perovskite-type vanadate LaVO3" , J. Lumin. 108, 185 (2004).
H. Okamoto, S. Iwai and H. Matsuzaki, "Photoinduced phase transitions in one-dimensional correlated electron systems", "Photoinduced phase transitions" ed. by K. Nasu (World Scientific) 239 (2004).
Collaborated Research
H. Sakamoto, K. Mizoguchi, and T. Hasegawa, "Magnetic properties of (BEDT-TTF)(ClMeTCNQ) studied by ESR under pressure: a neutral-ionic crossover and thermoinduced mesophase", Phys. Rev. Lett. 93, 186401 (2004).
Y. Kaneko, T. Arima, J. P. He, R. Kumai, and Y. Tokura, "Magnetic and Crystal Structures of Polar Ferrimagnet Ga2-xFexO3", J. Magn, Magn. Mater. 272, 555 (2004).
T. Arima, D. Higashiyama, Y. Kaneko, J. P. He, T. Goto, S. Miyasaka, T. Kimura, K. Oikawa, T. Kamiyama, R. Kumai, and Y. Tokura, "Structural and Magnetoelectric Properties of Ga2-xFexO3 Single Crystals Grown by a Floating-Zone Method", Phys. Rev. B 70, 064426 (2004).
D. Akahoshi, Y. Okimoto, M. Kubota, R. Kumai, T. Arima, Y. Tomioka, and Y. Tokura, "Charge-orbital Ordering Nera the Multicritical Point in A-site Ordered Perovskites SmBaMn2O6 and NdBaMn2O6", Phys. Rev. B 70, 064418 (2004).
M. Ono, K. Miura, A. Maeda, H. Matsuzaki, H. Kishida, Y. Taguchi, Y. Tokura, M. Yamashita, and H. Okamoto, "Linear and nonlinear optical properties of one-dimensional Mott insulators consisting of Ni-halogen chain and CuO-chain compounds", Phys. Rev. B 70, 085101 (2004).
K. Ueno, IH Inoue, T. Yamada, H. Akoh, Y. Tokura, and H. Takagi, "Field-effect transistor based on KTaO perovskite", Appl. Phys. Lett. 84, 3726 (2004).
Y. Ishii, H. Sato, A. Sawa, T. Yamada, H. Akoh, K. Endo, M. Kawasaki, and Y. Tokura, "Precipitate-free films of LaSrMnO grown on the substrates with artificial step edges", Appl. Phys. Lett. 85, 3800 (2004).