Publications

Peer-reviewed papers

*Corresponding author

[42]

W. Zhou, K. Masuda, K. Sumida, Y. Fujita, A. Kimura, and Y. Sakuraba

“Comparative experimental and theoretical study on anomalous Nernst effect of Heusler alloy Co2FeSi thin film: Estimation of on-site Coulomb interaction at Co site”

Sci. Technol. Adv. Mater. 26, 2564061 (2025).

[41]

K. Kunitomo, K. Sumida*, K. Miyamoto, and T. Okuda

“Spin-polarized electronic structure of tetragonally distorted FeCo thin films on Rh(001) exhibiting perpendicular magnetic anisotropy”

Physical Review Materials 9, 064407 (2025).

[40]

K. Sumida, M. Kakoki, Y. Sakuraba, K. Masuda, T. Kono, K. Goto, K. Miyamoto, Y. Miura, K. Hono, T. Okuda, and A. Kimura

“Surface-specific thermal spin-depolarization on the half-metallic Heusler films”

Communications Physics 8, 12 (2025).

[39]

R. Fukushima, V. N. Antonov, M. M. Otrokov, T. T. Sasaki, R. Akiyama, K. Sumida, K. Ishihara, S. Ichinokura, K. Tanaka, Y. Takeda, D. P. Salinas, S. V. Eremeev, E. V. Chulkov, A. Ernst, and T. Hirahara

“Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures”

Physical Review Materials 8, 084202 (2024).

[38]

T. Iwata, T. Kousa, Y. Nishioka, K. Ohwada, K. Sumida, E. Annese, M. Kakoki, K. Kuroda, H. Iwasawa, M. Arita, S. Kumar, A. Kimura, K. Miyamoto, and T. Okuda

“Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector”

Scientific Reports 14, 127 (2024).

[37]

K. Sumida, Y. Fujita, W. Zhou, K. Masuda, I. Kawasaki, S. Fujimori, A. Kimura, and Y. Sakuraba

“Role of on-site Coulomb interactions in the half-metallic Weyl ferromagnet candidate thin-film Co2FeSi”

Physical Review B 108, L241101 (2023).

[36]

H. Iwasawa, K. Sumida, S. Ishida, P. L. Fevre, F. Bertran, Y. Yoshida, H. Eisaki, A. F. Santander-Syro, and T. Okuda

“Exploring spin-polarization in Bi-based high-Tc cuprates”

Scientific Reports 13, 13451 (2023).

[35]

K. Sumida, S. Higaki, H. Sato, D. Tsuru, K. Miyamoto, T. Okuda, Y. Kuroiwa, C. Moriyoshi, K. Takase, T. Oguchi, and A. Kimura

“One-dimensional band structure in quasi-two-dimensional η-Mo4O11 revealed by angle-resolved photoelectron spectroscopy and first-principles calculation”

Journal of the Physical Society of Japan 92, 084706 (2023).

[34]

J. Reimann, K. Sumida, M. Kakoki, K. A. Kokh, O. E. Tereshchenko, A. Kimura, J. Güdde, and U. Höfer

“Ultrafast electron dynamics in a topological surface state observed in two-dimensional momentum space”

Scientific Reports 13, 5796 (2023).

[33]

K. Sumida, S. Kusaka, Y. Takeda, K. Kobayashi, and T. Hirahara

“Formation of monolayer V5Se8 from multilayer VSe2 films via V- and Se-desorption”

Physical Review B 106, 195421 (2022).

[32]

K. Yamagami, Y. Fujisawa, M. Pardo-Almanza, B. R. M. Smith, K. Sumida, Y. Takeda, and Y. Okada

“Enhanced d−p hybridization intertwined with anomalous ground state formation in the van der Waals itinerant magnet Fe5GeTe2”

Physical Review B 106, 045137 (2022).

[31]

S. Kusaka, T. T. Sasaki, K. Sumida, S. Ichinokura, S. Ideta, K. Tanaka, K. Hono, and T. Hirahara

“Fabrication of (Bi2)m(Bi2Te3)n superlattice films by Te desorption from a pristine Bi2Te3 film”

Applied Physics Letters 120, 173102 (2022).

[30]

K. Sumida, Y. Takeda, S. Kusaka, K. Kobayashi, and T. Hirahara

“Short-range magnetic interaction in a monolayer 1T-VSe2 film revealed by element-specific x-ray magnetic circular dichroism”

Physical Review Materials 6, 014006 (2022).

[29]

T. Kono, M. Kakoki, T. Yoshikawa, X. Wang, K. Sumida, T. Muro, K. Goto, Y. Sakuraba, R. Y. Umetsu, and A. Kimura

“Three-dimensional bulk Fermi surfaces and Weyl crossings of Co2MnGa thin films underneath a protection layer”

Physical Review B 104, 195112 (2021).

[28]

K. Sumida, Y. Ishida, J. Güdde, U. Höfer, S. Shin, and A. Kimura 

“Ultrafast surface Dirac fermion dynamics of Sb2Te3-based topological insulators”

Progress in Surface Science 96, 100628 (2021).

[27]

T. Fukasawa, S. Kusaka, K. Sumida, M. Hashizume, S. Ichinokura, Y. Takeda, S. Ideta, K. Tanaka, R. Shimizu, T. Hitosugi, and T. Hirahara 

“Absence of ferromagnetism and Dirac-cone gap in MnBi2Te4/Bi2Te3 down to 6 K”

Physical Review B 103, 205405 (2021).

[26]

K. Sumida, Y. Sakuraba, K. Masuda, T. Kono, M. Kakoki, K. Goto, W. Zhou, K. Miyamoto, Y. Miura, T. Okuda, and A. Kimura

“Spin-polarized Weyl cones and giant anomalous Nernst effect in ferromagnetic Heusler films”

Communications Materials 1, 89 (2020).

[25]

T. Hirahara, M. M. Otrokov, T. Sasaki, K. Sumida, Y. Tomohiro, S. Kusaka, Y. Okuyama, S. Ichinokura, M. Kobayashi, Y. Takeda, K. Amemiya, T. Shirasawa, S. Ideta, K. Miyamoto, K. Tanaka, S. Kuroda, T. Okuda, K. Hono, S. V. Eremeev, and E. V. Chulkov

“Fabrication of a novel magnetic topological heterostructure and temperature evolution of its massive Dirac cone”

Nature Communications 11, 4821 (2020).

[24]

T. Yoshikawa, V. N. Antonov, T. Kono, M. Kakoki, K. Sumida, K. Miyamoto, Y. Takeda, Y. Saitoh, K. Goto, Y. Sakuraba, K. Hono, A. Ernst, and A. Kimura

“Unveiling spin-dependent unoccupied electronic states of Co2MnGe (Ga) film via Ge (Ga) L2,3 absorption spectroscopy”

Physical Review B 102, 064428 (2020).

[23]

M. Nurmamat, K. Okamoto, S. Zhu, T. V. Menshchikova, I. P. Rusinov, V. O. Korostelev, K. Miyamoto, T. Okuda, T. Miyashita, X. Wang, Y. Ishida, K. Sumida, E. F. Schvier, M. Ye, Ziya S. Aliev, M. B. Babany, I. R. Amiraslanov, E. V. Chulkov, K. A. Kokh, O. E. Tereshchenko, K. Shimada, S. Shin, and A. Kimura

“Topologically Non-trivial Phase-change Compound GeSb2Te4”

ACS Nano 14, 9059 (2020).

[22]

K. Taguchi, K. Sumida, Y. Okuda, K. Miyamoto, A. Kimura, T. Oguchi, and T. Okuda

“Spectroscopic evidence of quasi-one-dimensional metallic Rashba spin-split states on the Si(111)5x2-Au surface”

Physical Review B 101, 045430 (2020).

[21]

X. X. Wang, J. Chen, M. Zheng, T. V. Menshchikova, I. P. Rusinov, E. F. Schwier, F. Orbanić, S. Wu, K. Sumida, T. Yoshikawa, K. Miyamoto, M. Nurmamat, T. Okuda, K. Shimada, M. Novak, E. V. Chulkov, and A. Kimura

“Disentangling orbital and spin textures of the surface-derived states in non-symmorphic semimetal HfSiS”

Physical Review B 100, 205140 (2019).  

[20]

T. Yoshikawa, K. Sumida, Y. Ishida, J. Chen, M. Nurmamat, K. Akiba, A. Miyake, M. Tokunaga, K. A. Kokh, O. E. Tereshchenko, S. Shin, and A. Kimura

“Bidirectional surface photovoltage on a topological insulator”

Physical Review B 100, 165311 (2019).   

[19]

T. Kono, M. Kakoki, T. Yoshikawa, X. Wang, K. Sumida, K. Miyamoto, T. Muro, Y. Takeda, Y. Saitoh, K. Goto, Y. Sakuraba, K. Hono, and A. Kimura

“Element-specific density of states of Co2MnGe revealed by resonant photoelectron spectroscopy”

Physical Review B 100, 165120 (2019).   

[18]

K. Sumida, M. Kakoki, J. Reimann, M. Nurmamat, S. Goto, Y. Takeda, Y. Saitoh, K. A. Kokh, O. E. Tereshchenko, J. Güdde, U. Höfer, and A. Kimura

“Magnetic-impurity-induced modifications to ultrafast carrier dynamics in the ferromagnetic topological insulators Sb2-xVxTe3”

New Journal of Physics 21, 093006 (2019).  

[17]

M. Ye, T. Xu, G. Li, S. Qiao, Y. Takeda, Y. Saitoh, S.-Y. Zhu, M. Nurmamat, K. Sumida, Y. Ishida, S. Shin, and A. Kimura

“Negative Te spin polarization responsible for ferromagnetic order in the doped topological insulator V0.04(Sb1-xBix)1.96Te3”

Physical Review B 99, 144413 (2019).  

[16]

O. J. Clark, F. Massola, I. Markovic, J. M. Riley, J. Feng, B.-J. Yang, K. Sumida, T. Okuda, J. Fujii, I. Vobornik, T. K. Kim, K. Okawa, T. Sasagawa, M. S. Bahramy, and P. D. C. King

“A general route to form topologically-protected surface and bulk Dirac fermions along high-symmetry lines”

Electronic Structure 1, 014002 (2019). 

[15]

K. Sumida, Y. Ishida, T. Yoshikawa, J. Chen, M. Nurmamat, K. A. Kokh, O. E. Tereshchenko, S. Shin, and A. Kimura

“Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator”

Physical Review B 99, 085302 (2019).

[14]

P. Zhang, Z. Wang, X. Wu, K. Yaji, Y. Ishida, Y. Kohama, G. Dai, Y. Sun, C. Bareille, K. Kuroda, T. Kondo, K. Okazaki, K. Kindo, X. Wang, C. Jin, J. Hu, R. Thomale, K. Sumida, S. Wu, K. Miyamoto, T. Okuda, H. Ding, G. D. Gu, T. Tamegai, T. Kawakami, M. Sato and S. Shin

“Multiple topological states in iron-based superconductors”

Nature Physics 15, 41 (2019).

[13]

K. Sumida, T. Natsumeda, K. Miyamoto, I. V. Silkin, K. Kuroda, K. Shirai, S. Zhu, K. Taguchi, M. Arita, J. Fujii, A. Varykhalov, O. Rader, V. A. Golyashov, K. A. Kokh, O. E. Tereshchenko, E. V. Chulkov, T. Okuda, and A. Kimura

“Enhanced surface state protection and band gap in the topological insulator PbBi4Te4S3”

Physical Review Materials 2, 104201 (2018).

[12]

M. Nurmamat, Y. Ishida, R. Yori, K. Sumida, S. Zhu, M. Nakatake, Y. Ueda, M. Taniguchi, S. Shin, Y. Akahama, and A. Kimura

“Prolonged photo-carriers generated in a massive-and-anisotropic Dirac material”

Scientific Reports 8, 9073 (2018). 

[11]

R. Akiyama, K. Sumida, S. Ichinokura, R. Nakanishi, A. Kimura, K. A. Kokh, O. E. Tereshchenko, and S. Hasegawa

“Shubnikov-de Haas oscillations in p and n-type topological insulator (BixSb1-x)2Te3”

Journal of Physics: Condensed Matter 30, 265001 (2018).

[10]

T. Yoshikawa, Y. Ishida, K. Sumida, J. Chen, K. A. Kokh, O. E. Tereshchenko, S. Shin, and A. Kimura

“Enhanced photovoltage on the surface of topological insulator via optical aging”

Applied Physics Letters 112, 192104 (2018).

[9]

M. Nurmamat, E. E. Krasovskii, Y. Ishida, K. Sumida, J. Chen, T. Yoshikawa, E. V. Chulkov, K. A. Kokh, O. E. Tereshchenko, S. Shin, and A. Kimura

“Ultrafast dynamics of an unoccupied surface resonance state in Bi2Te2Se”

Physical Review B 97, 115303 (2018).

[8]

S. Wu, K. Sumida, K. Miyamoto, K. Taguchi, T. Yoshikawa, A. Kimura, Y. Ueda, M. Arita, M. Nagao, S. Watauchi, I. Tanaka, and T. Okuda

“Direct evidence of hidden local spin polarization in a centrosymmetric superconductor LaO0.55F0.45BiS2”

Nature Communications 8, 1919 (2017).

[7]

K. Sumida, Y. Ishida, S. Zhu, M. Ye, A. Pertsova, C. Triola, K. A. Kokh, O. E. Tereshchenko, A. V. Balatsky, S. Shin, and A. Kimura

“Prolonged duration of nonequilibrated Dirac fermions in neutral topological insulators”

Scientific Reports 7, 14080 (2017).

[6]

T. Hirahara, S. V. Eremeev, T. Shirasawa, Y. Okuyama, T. Kubo, R. Nakanishi, R. Akiyama, A. Takayama, T. Hajiri, S. Ideta, M. Matsunami, K. Sumida, K. Miyamoto, Y. Takagi, T. Okuda, T. Yokoyama, S. Kimura, S. Hasegawa, and E. V. Chulkov

“Large-Gap Magnetic Topological Heterostructure Formed by Subsurface Incorporation of a Ferromagnetic Layer”

Nano Letters 17, 3493 (2017).

[5]

H. Haubold, K. Koepernic, D. Efremov, S. Khim, A. Fedorov, Y. Kushnirenko, J. van den Brink, S. Wurmehl, B. Büchner, T. K. Kim, M. Hoesch, K. Sumida, K. Taguchi, T. Yoshikawa, A. Kimura, T. Okuda, and S. V. Borisenko

“Experimental realization of type-II Weyl state in noncentrosymmetric TaIrTe4”

Physical Review B 91, 241108(R) (2017).

[4]

K. Hagiwara, Y. Ohtsubo, M. Matsunami, S. Ideta, K. Tanaka, H. Miyazaki, J. E. Rault, P. L. Fèvre, F. Bertran, A. Taleb-Ibarahimi, R. Yukawa, M. Kobayashi, K. Horiba, H. Kumigashira, K. Sumida, T. Okuda, F. Iga, and S. Kimura

“Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12”

Nature Communications 7, 12690 (2016).

[3]

M. Ye, W. Li, S. Zhu, Y. Takeda, Y. Saitoh, J. Wang, H. Pan, M. Nurmamat, K. Sumida, F. Ji, Z. Liu, H. Yang, Z. Liu, D. Shen, A. Kimura, S. Qiao, and X. Xie

“Carrier-mediated ferromagnetism in the magnetic topological insulator Cr-doped (Sb,Bi)2Te3”

Nature Communications 6, 8914 (2015).

[2]

S. Zhu, Y. Ishida, K. Kuroda, K. Sumida, M. Ye, J. Wang, H. Pan, M. Taniguchi, S. Qiao, S. Shin, and A. Kimura

“Ultrafast electron dynamics at the Dirac node of the topological insulator Sb2Te3”

Scientific Reports 5, 13213 (2015).

[1]

K. Sumida, K. Shirai, S. Zhu, M. Taniguchi, M. Ye, S. Ueda, Y. Takeda, Y. Saitoh, I. R. Aseguinolaza, J. M. Barandiarán, V. A. Chernenko, and A. Kimura

“Spectroscopic evidence of band Jahn-Teller distortion upon martensitic phase transition in Heusler-type Ni-Fe(Co)-Ga ferromagnetic shape-memory alloy films”

Physical Review B 91, 134417 (2015).