PUBLICATIONS & TALKS

Preprints

2024

T. Kawamura, K. Yoshimi, K. Hashimoto, A. Kobayashi, and T. Misawa,

Phys. Rev. Lett. 132, 156502 (2024); arXiv:2312.00367.

Y. Saito, O. Ganter, C. Shang, K. Hashimoto, T. Sasaki, S. M. Winter, J. Müller, and M. Lang,

Phys. Rev. Research 6, 023003 (2024); arXiv:2310.16637.

K. Imamura, Y. Mizukami, O. Tanaka, R. Grasset, M. Konczykowski, N. Kurita, H. Tanaka, Y. Matsuda, M. G. Yamada, K. Hashimoto, and T. Shibauchi,

Phys. Rev. X 14, 011045; arXiv:2306.17380.

K. Imamura, S. Suetsugu, Y. Mizukami, Y. Yoshida, K. Hashimoto, K. Ohtsuka, Y. Kasahara, N. Kurita, H. Tanaka, P. Noh, J. Nasu, E.-G. Moon, Y. Matsuda, and T. Shibauchi, 

Science Advances 10, eadk3539 (2024); arXiv:2305.10619.

T. Asaba, A. Onishi, Y. Kageyama, T. Kiyosue, K. Ohtsuka, S. Suetsugu, Y. Kohsaka, T. Gaggl, Y. Kasahara, H. Murayama, K. Hashimoto, R. Tazai, H. Kontani, B. R. Ortiz, S. D. Wilson, Q. Li, H.-H. Wen, T. Shibauchi, and Y. Matsuda, 

Nature Physics 20, 40 (2024); arXiv:2309.16985.

2023

K. Ishihara,  M. Roppongi, M. Kobayashi, Y. Mizukami, H. Sakai, Y. Haga, K. Hashimoto, and T. Shibauchi, 

Nature Communications 14, 2966 (2023); arXiv:2105.13721.

K. Matsuura, M. Roppongi, M. Qiu, Q. Sheng, Y. P. Cai, K. Yamakawa, Z. Guguchia, R. P. Day, K. M. Kojima, A. Damascelli, Y. Sugimura, M. Saito, T. Takenaka, K. Ishihara, Y. Mizukami, K. Hashimoto, Y. Gu, S. L. Guo, L. C. Fu, Z. Zhang, F. L. Ning, G. Q. Zhao, G. Y. Dai, C. Q. Jin, J. W. Beare, G. M. Luke, Y. J. Uemura, and T. Shibauchi,

Proc. Natl. Acad. Sci. USA 120, e2208276120  (2023); arXiv:2304.03409.

K. Ishihara, M. Kobayashi, K. Imamura, M. Konczykowski, H. Sakai, P. Opletal, Y. Tokiwa, Y. Haga, K. Hashimoto, and T. Shibauchi, 

Phys. Rev. Res. 5, L022002 (2023); arXiv:2301.04801.

Y. Watanabe, A. Miyake, M. Gen, Y. Mizukami, K. Hashimoto, T. Shibauchi, A. Ikeda, M. Tokunaga, T. Kurumaji, Y. Tokunaga, and T. Arima,

      Nature Communications  14, 1260 (2023).

M. Roppongi, K. Ishihara, Y. Tanaka, K. Ogawa, K. Okada, S. Liu, K. Mukasa, Y. Mizukami, Y. Uwatoko, R. Grasset, M. Konczykowski, B. R. Ortiz, S. D. Wilson,  K. Hashimoto, and T. Shibauchi,

Nature Communications 14, 667 (2023); arXiv:2206.02580.

2022

K. Hashimoto, R. Kobayashi, S. Ohkura, S. Sasaki, N. Yoneyama, M. Suda, H. M. Yamamoto, and T. Sasaki, 

Crystals 12, 831 (2022).

T. Thomas, T. Thyzel, H. Sun, J. Müller, K. Hashimoto, T. Sasaki, and H. M. Yamamoto, 

Phys. Rev. B 105, 205111 (2022); arXiv:2202.05602.

K. Ishida, Y. Onishi, M. Tsujii, K. Mukasa, M. Qiu, M. Saito, Y. Sugimura, K. Matsuura, Y. Mizukami, K. Hashimoto, and T. Shibauchi, 

      Proc. Natl. Acad. Sci. USA 119, e2110501119 (2022); arXiv:2202.11674.

O. Tanaka, Y. Mizukami, R. Harasawa, K. Hashimoto, N. Kurita, H. Tanaka, S. Fujimoto, Y. Matsuda, E.-G. Moon, and T. Shibauchi, 

Nature Physics 18, 429–435 (2022); arXiv:2007.06757.

T. Thomas, Y. Saito, Y. Agarmani, T. Thyzel, K. Hashimoto, T. Sasaki, M. Lang, and J. Müller, 

Phys. Rev. B 105, L041114 (2022); arXiv:2109.00811.

2021

K. Ishihara, T. Takenaka, Y. Miao, Y. Mizukami, K. Hashimoto, M. Yamashita, M. Konczykowski, R. Masuki, M. Hirayama, T. Nomoto, R. Arita, O. Pavlosiuk, P. Wisniewski, D. Kaczorowski, and T. Shibauchi,

Phys. Rev. X 11, 041048 (2021); arXiv:2110.01819.

S. Uji, T. Terashima, S. Sugiura, S. Iguchi, T. Sasaki, K. Hashimoto, M. Shimozawa, N. Yoneyama, and R. Kato, 

J. Phys. Soc. Jpn. 90, 113708 (2021).

T. Takenaka*, K. Ishihara*, M. Roppongi, Y. Miao, Y. Mizukami, T. Makita, J. Tsurumi, S. Watanabe, J. Takeya, M. Yamashita, K. Torizuka, Y. Uwatoko, T. Sasaki, X. Huang, W. Xu, D. Zhu, N. Su, J.-G. Cheng, T. Shibauchi, and K. Hashimoto (*These authors contributed equally to this work), 

Science Advances  7, eabf3996 (2021); arXiv:2103.15607.

K. Mukasa, K. Matsuura, M. Qiu, M. Saito, Y. Sugimura, K. Ishida, M. Otani, Y. Onishi, Y. Mizukami, K. Hashimoto, J. Gouchi, R. Kumai, Y. Uwatoko, and T. Shibauchi, 

Nature Communications 12, 381 (2021).

2020

J. Shiogai, T.  Chida,  K. Hashimoto, K. Fujiwara, T.  Sasaki, and A. Tsukazaki, 

Phys. Rev. B 101, 125125 (2020); arXiv:2003.07181.

Selected papers      ***For the full list, please visit Google scholar or Publons***

1. "Strongly correlated superconductivity in a copper-based metal-organic framework with a perfect kagome lattice"

T. Takenaka*, K. Ishihara*, M. Roppongi, Y. Miao, Y. Mizukami, T. Makita, J. Tsurumi, S. Watanabe, J. Takeya, M. Yamashita, K. Torizuka, Y. Uwatoko, T. Sasaki, X. Huang, W. Xu, D. Zhu, N. Su, J.-G. Cheng, T. Shibauchi, and K. Hashimoto (*These authors contributed equally to this work)

Science Advances  7, eabf3996 (2021).


2. "Crystallization and vitrification of electrons in a glass-forming charge liquid",

S. Sasaki*, K. Hashimoto*, R. Kobayashi, K. Itoh, S. Iguchi, Y. Nishio, Y. Ikemoto, T. Moriwaki, N. Yoneyama, M. Watanabe, A. Ueda, H. Mori, K. Kobayashi, R. Kumai, Y. Murakami, J. Muller, and T. Sasaki, (*These authors contributed equally to this work)

Science 357, 1381 (2017).  


3.  "Quantum-disordered state of magnetic and electric dipoles in an organic Mott system",

M. Shimozawa*, K. Hashimoto*, A. Ueda, Y. Suzuki, K. Sugii, S. Yamada, Y. Imai, R. Kobayashi, K. Itoh, S. Iguchi, M. Naka, S. Ishihara, H. Mori, T. Sasaki, and M. Yamashita, (*These authors contributed equally to this work)

Nature Communications 8, 1821 (2017).  


4. "Dimer-Mott and charge-ordered insulating states in the quasi-one-dimensional organic conductors δP- and δC-(BPDT-TTF)2ICl2",

R. Kobayashi, K. Hashimoto, N. Yoneyama, K. Yoshimi, Y. Motoyama, S. Iguchi, Y. Ikemoto, T. Moriwaki, H. Taniguchi, and T. Sasaki,

Phys. Rev. B 96, 115112 (2017).


5.  "Emergence of charge degrees of freedom under high pressure in the organic dimer-Mott insulator β'-(BEDT-TTF)2ICl2"

K. Hashimoto, R. Kobayashi, H. Okamura, H. Taniguchi, Y. Ikemoto, T. Moriwaki, S. Iguchi, M. Naka, S. Ishihara and T. Sasaki,

Phys. Rev. B 92, 085149 (2015). 


6.  "Collective excitation of a short-range charge ordering in θ-(BEDT-TTF)2CsZn(SCN)4"

K. Hashimoto, S. C. Zhan, R. Kobayashi, S. Iguchi, N. Yoneyama, T. Moriwaki, Y. Ikemoto, and T. Sasaki,

Phys. Rev. B 89, 085107 (2014).


1.  "Anomalous superfluid density in quantum critical superconductors",

 K. Hashimoto, Y. Mizukami, R. Katsumata, H. Shishido, M. Yamashita, H. Ikeda, Y. Matsud, J. A. Schlueter, J. D. Fletcher, A. Carrington, D. Gnida, D. Kaczorowski, and T. Shibauchi,

PNAS 110, 3293-3297 (2013).


2.  "A aharp peak of the zero-temperature penetration depth at optimal composition in BaFe2(As1-xPx)2",

 K. Hashimoto, K. Cho, T. Shibauchi, S. Kasahara, Y. Mizukami, R. Katsumata, Y. Tsuruhara, T. Terashima, H. Ikeda, M. A. Tanatar, H. Kitano, N. Salovich, R. W. Giannetta, P. Walmsley, A. Carrington, R. Prozorov, and Y. Matsuda,

Science 336, 1554-1557 (2012).


1.  "High-pressure phase diagrams of FeSe1-xTex: correlation between suppressed nematicity and enhanced superconductivity",

K. Mukasa, K. Matsuura, M. Qiu, M. Saito, Y. Sugimura, K. Ishida, M. Otani, Y. Onishi, Y. Mizukami, K. Hashimoto, J. Gouchi, R. Kumai, Y. Uwatoko, and T. Shibauchi,

Nature Communications 12, 381 (2021).


2.  "Disorder-induced topological change of the superconducting gap structure in iron pnictides",

Y. Mizukami, M. Konczykowski, Y. Kawamoto, S. Kurata, S. Kasahara, K. Hashimoto, V. Mishra, A. Kreisel, Y. Wang, P. J. Hirschfeld, Y. Matsuda, and T. Shibauchi,

Nature Communications 5, 5657 (2014).


3.  "Electronic nematicity above the structural and superconducting transition in BaFe2(As1-xPx)2",

S. Kasahara, H. J. Shi, K. Hashimoto, S. Tonegawa, Y. Mizukami, T. Shibauchi, K. Sugimoto, T. Fukuda, T. Terashima, Andriy H. Nevidomskyy, and Y. Matsuda,

Nature 486, 382-385 (2012).


4.  "Octet-Line Node Structure of Superconducting Order Parameter in KFe2As2",

K. Okazaki, Y. Ota, Y. Kotani, W. Malaeb, Y. Ishida, T. Shimojima, T. Kiss, S. Watanabe, C.-T. Chen, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Saito, H. Fukazawa, Y. Kohori, K. Hashimoto, T. Shibauchi, Y. Matsuda, H. Ikeda, H. Miyahara, R. Arita, A. Chainani, and S. Shin,

Science 337, 1314-1317 (2012).


5.  "Nodal versus nodeless order parameters in LiFeP and LiFeAs superconductors",

K. Hashimoto, S. Kasahara, R. Katsumata, Y. Mizukami, M. Yamashita, H. Ikeda, T. Terashima, A. Carrington, Y. Matsuda, and T. Shibauch,

Phys. Rev. Lett. 108, 047003 (2012).


6.  "Line Nodes in the Energy Gap of Superconducting BaFe2(As1-xPx)2",

K. Hashimoto, M. Yamashita, S. Kasahara, Y. Senshu, N. Nakata, S. Tonegawa, K. Ikada, A. Serafin, A. Carrington, T. Terashima, H. Ikeda, T. Shibauchi, and Y. Matsuda,

Phys. Rev. B 81, 220501(R) (2010).


7.  "Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density",

K. Hashimoto, T. Shibauchi, S. Kasahara, K. Ikada, S. Tonegawa, T. Kato, R. Okazaki, C. J. van der Beek, M. Konczykowski, H. Takeya, K. Hirata, T. Terashima, and Y. Matsuda,

Phys. Rev. Lett. 102, 207001 (2009).


8.  "Microwave Penetration Depth and Quasiparticle Conductivity of PrFeAsO1-y Single Crystals: Evidence for a Full-Gap Superconductor",

K. Hashimoto, T. Shibauchi, T. Kato, R. Okazaki, H. Shishido, M. Ishikado, H. Kito, A. Iyo, H. Eisaki, S. Shamoto, and Y. Matsuda,

Phys. Rev. Lett. 102, 017002 (2009).


1.  "Cyclotron resonance study of quasiparticle mass and scattering rate in the hidden-order and superconducting phases of URu2Si2"

S. Tonegawa, K. Hashimoto, K. Ikada, Y. Tsuruhara, Y.-H. Lin, H. Shishido, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi,

Phys. Rev. B 88, 245131 (2013).


2.  "Cyclotron Resonance in the Hidden-Order Phase of URu2Si2"

S. Tonegawa, K. Hashimoto, K. Ikada, Y.-H. Lin, H. Shishido, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi

Phys. Rev. Lett. 109, 036401 (2012).


3.  "Possible Phase Transition Deep Inside the Hidden Order Phase of Ultraclean URu2Si2"

H. Shishido, K. Hashimoto, T. Shibauchi, T. Sasaki, H. Oizumi, N. Kobayashi, T. Takamasu, K. Takehana, Y. Imanaka, T. D. Matsuda, Y. Haga, Y. Onuki, and Y. Matsuda

Phys. Rev. Lett. 102, 156403 (2009). 

Reviews (in Japanese)

Y. Mizukami, K. Hashimoto, and T. Shibauchi,

KotaiButsuri 57(11), 643-655 (2022). 

K. Ishihara, T. Shibauchi, and K. Hashimoto

KotaiButsuri 57(7), 411-421 (2022). 

Masaaki Shimozawa, Akira Ueda, Kenichiro Hashimoto, Makoto Naka, 

KotaiButsuri 54(1), 43-54  (2019).

Kenichiro Hashimoto, Takahiko Sasaki,

Kotaibutsuri 53(12), 745-758 (2018).

Invited Talks

20. "Randomness effect on charge glass formation in θ-type BEDT-TTF compounds"

Kenichiro Hashimoto, SPICE Workshop "New Spin on Molecular Quantum Materials", Mainz, Germany, May 24-26, 2022.

19. "Superconducting gap structure of kagome lattice superconductors"

Kenichiro Hashimoto, Yukawa Institute for Theoretical Physics Workshop: Frontiers of superconducting phenomena induced by non-trivial electronic states: New challenges and prospects, Panasonic International Interactive Hall, Yukawa Institute, Kyoto University, December 22-24, 2021.

18. "Strongly correlated superconductivity in a two-dimensional coordination polymer"

Kenichiro Hashimoto, 37th meeting in JSPS Committee 181 (Online), July 28, 2021.

17. "Strongly correlated superconductivity in a coordination polymer with two-dimensional kagome lattice"

Kenichiro Hashimoto, Molecular Crystals Online Seminar (Online), May 25, 2021.

16. "Vitrification and crystallization of electrons in a solid"

Kenichiro Hashimoto, KEK IPNS-IMSS-QUP Joint workshop (Online), March 29-31, 2021.

15. "Geometrical frustration and randomness effects in strongly correlated electron glasses"

Kenichiro Hashimoto, JPS (Online), Divisions 5, 7, 8 Symposium:New frontiers of nonequilibrium phenomena driven by electron correlation effect: From charge glass to photoinduced phase transition, March 12-15, 2021.

14. "Exotic physical properties emerging from geometrically frustrated pi electrons: From quantum liquids to superconductivity" 

 K. Hashimoto, International Symposium on Molecular Science —Physical Chemistry/Theoretical Chemistry,  Chemoinformatics, Computational Chemistry— Cosponsored by Japan Society for Molecular Science (Online), March 19-22, 2021.

13.  "Quantum condensed phases created by geometrical frustration and electron correlation"

 K. Hashimoto, ISSP Workshop (Online): Recent Progress and Future Prospects of Quantum Materials Research, September 24, 28, 29, 2020.

12.   "Geometrical frustration effects on charge and spin degrees of freedom in strongly correlated π electrons"

K. Hashimoto, Electron Correlation in Superconductors and Nanostructures (ECSN-2019), Odessa , Ukraine, October 6-10, 2019.

11.  "Geometrical frustration effects on charge and spin degrees of freedom in strongly correlated π electrons"

K. Hashimoto, 7th International Symposium on π-System Figuration , Osaka, Japan, March 29-30, 2019.

10. "Study of charge fluctuations induced by long-range Coulomb interactions of molecular materials in strongly correlated electron systems"

Kenichiro HashimotoJPSJ Young Scientist Award Commemorative Lecture, Ito Campus, Kyushu University, 14-17 March 2019

9.  "Crystallization and vitrification of  strongly correlated electrons on a geometrically frustrated  triangular  lattice"

K. Hashimoto, Glass Workshop (Satellite event) in The 2nd Symposium for World Leading Research Centers‐ Materials Science and Spintronics ‐, Sendai, Japan, February 15-18, 2019.

8.  "Macroscopic quantum phenomena caused by charge, spin, and lattice degrees of freedom of strongly correlated pi-electrons"

Kenichiro Hashimoto, Molecular Research Institute WorkshopMolecular Research Institute, Okazaki, January 25, 2019.

7.  "Vitrification and crystallization of electrons in an organic solid crystal"

Kenichiro Hashimoto, Cryopreservation Conference 2018,  Okazaki Conference Center, National Insitutes of National Sciences, October 25-26, 2018

6.  "Quantum spin liquid state in π-systems using hydrogen dynamics"

Kenichiro Hashimoto , JPS Symposium (Division 7)Kyotanabe Campus, Doshisha University, September 9-12, 2018.   

5.  "Crystallization and Vitrification of Strongly Correlated Electrons on a Geometrically Frustrated Triangular Lattice"

K. Hashimoto, The International Conference on Science and Technology of Synthetic Metals 2018 (ICSM 2018),  Busan, Korea, July 1-6, 2018.

4.  "Crystallization and Vitrification of π-Electrons in a Geometrically Frustrated Charge-Ordered System"

K. Hashimoto, The 12th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2017),  Miyagi Zao, Japan, September 24-29, 2017.  

3.  "Diverse electronic properties of π-electrons in organic solids"

Kenichiro Hashimoto, The 3rd Young Researchers Association Meeting, Ishikawa, November 11-12, 2016.

2.  "Quantum paraelectricity in the proton-π-electron correlated organic conductor κ-H3(Cat-EDT-TTF)2"

Kenichiro Hashimoto, ISSP Workshop: Frontiers of π-electronic condensed matter science, ISSP, The University of Tokyo, August 8-10, 2016.   

1.  "Dielectric and optical properties of κ-H3(Cat-EDT-TTF)2"

Kenichiro Hashimoto, ISSP Worlshop: Functional properties of π-electron-hydrogen correlated molecular materials, ISSP, The University of Tokyo, March 29, 2016.