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Interactions between atomic-scale skyrmions in 2D chiral magnets
Mai Kameda, Koji Kobayashi, and Yuki Kawaguchi
Sci. Rep. 16, 12941 (2026)
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Backsolution: A Framework for Solving Inverse Problems via Automatic Differentiation
K. Kobayashi and T. Ohtsuki
arXiv:2506.13210
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Topological spin-orbit torque in ferrimagnetic Weyl semimetal
Tomonari Meguro, Akihiro Ozawa, Koji Kobayashi, Yasufumi Araki, and Kentaro Nomura
Phys. Rev. Res. 7, L022065 (2025)
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Giant antisymmetric magnetoresistance arising across optically controlled domain walls in the magnetic Weyl semimetal Co3Sn2S2
Kohei Fujiwara, Kazuma Ogawa, Naotaka Yoshikawa, Koji Kobayashi, Kentaro Nomura, Ryo Shimano, and Atsushi Tsukazaki
Commun. Mater. 5, 239 (2024)
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Effective Tight-Binding Model of Compensated Ferrimagnetic Weyl Semimetal with Spontaneous Orbital Magnetization
Tomonari Meguro, Akihiro Ozawa, Koji Kobayashi, and Kentaro Nomura
J. Phys. Soc. Jpn. 93, 034703 (2024)
DOI: 10.7566/JPSJ.93.034703
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Effective model analysis of intrinsic spin Hall effect with magnetism in stacked-kagome Weyl semimetal Co3Sn2S2
Akihiro Ozawa, Koji Kobayashi, and Kentaro Nomura
Phys. Rev. Applied 21, 014041 (2024)
DOI: 10.1103/PhysRevApplied.21.014041
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Magnetic orderings from spin-orbit coupled electrons on kagome lattice
Jin Watanabe, Yasufumi Araki, Koji Kobayashi, Akihiro Ozawa, and Kentaro Nomura
J. Phys. Soc. Jpn. 91, 083702 (2022)
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Wannier-based implementation of the coherent potential approximation with applications to Fe-based transition metal alloys
Naohiro Ito, Takuya Nomoto, Koji Kobayashi, Sergey Mankovsky, Kentaro Nomura, Ryotaro Arita, Hubert Ebert, and Takashi Koretsune
Phys. Rev. B 105, 125136 (2022)
DOI: 10.1103/PhysRevB.105.125136
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Intrinsic and extrinsic anomalous Hall effects in disordered magnetic Weyl semimetal
Koji Kobayashi and K. Nomura
J. Phys. Soc. Jpn. 91, 013703 (2022)
DOI: 10.7566/JPSJ.91.013703
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Quantum Hall effect induced by chiral Landau levels in topological semimetal films
D.-H.-Minh Nguyen, Koji Kobayashi, Jan-Erik R. Wichmann, and Kentaro Nomura
Phys. Rev. B 104, 045302 (2021)
DOI: 10.1103/PhysRevB.104.045302
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Ferromagnetic-electrodes-induced Hall effect in topological Dirac semimetals
K. Kobayashi and K. Nomura
Phys. Rev. Res. 3, 033023 (2021)
DOI: 10.1103/PhysRevResearch.3.033023
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Ballistic transport in disordered Dirac and Weyl semimetals
K. Kobayashi, M. Wada, and T. Ohtsuki
Phys. Rev. Res. 2, 022061(R) (2020)
DOI: 10.1103/PhysRevResearch.2.022061
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Robust magnetotransport in disordered ferromagnetic kagome layers with quantum anomalous Hall effect
K. Kobayashi, M. Takagaki, and K. Nomura
Phys. Rev. B 100, 161301(R) (2019)
DOI: 10.1103/PhysRevB.100.161301
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Topological Matter in the Absence of Translational Invariance
Koji Kobayashi, Tomi Ohtsuki, Ken‐Ichiro Imura
"Advanced Topological Insulators" (Scrivener Publishing), Chapter 4, pp. 109-157 (2019)
ISBN: 9781119407317, DOI: 10.1002/9781119407317
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Helicity-protected domain-wall magnetoresistance in ferromagnetic Weyl semimetal
K. Kobayashi,Y. Ominato, K. Nomura
J. Phys. Soc. Jpn. 87, 073707 (2018)
DOI: 10.7566/JPSJ.87.073707
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Anisotropic magnetotransport in Dirac-Weyl magnetic junctions
Y. Ominato, K. Kobayashi, K. Nomura
Phys. Rev. B 95, 085308 (2017)
DOI: 10.1103/PhysRevB.95.085308
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Comparative study of Weyl semimetal, topological and Chern insulators: thin-film point of view
Y. Yoshimura, W. Onishi, K. Kobayashi, T. Ohtsuki, K.-I. Imura
Phys. Rev. B 94, 235414 (2016)
DOI: 10.1103/PhysRevB.94.235414
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Dimensional crossover of transport characteristics in topological insulator nanofilms
K. Kobayashi, Y. Yoshimura, K.-I. Imura, T. Ohtsuki
Phys. Rev. B 92, 235407 (2015)
DOI: 10.1103/PhysRevB.92.235407
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Engineering Dirac electrons emergent on the surface of a topological insulator
Y. Yoshimura, K. Kobayashi, T. Ohtsuki, K.-I. Imura
Sci. Technol. Adv. Mater. 16, 014403 (2015)
DOI: 10.1088/1468-6996/16/1/014403
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Modification and Control of Topological Insulator Surface States Using Surface Disorder
V. Sacksteder, T. Ohtsuki, K. Kobayashi
Phys. Rev. Applied 3, 064006 (2015)
DOI: 10.1103/PhysRevApplied.3.064006
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Density of States Scaling at the Semimetal to Metal Transition in Three Dimensional Topological Insulators
K. Kobayashi, T. Ohtsuki, K.-I. Imura, I. F. Herbut
Phys. Rev. Lett. 112, 016402 (2014)
DOI: 10.1103/PhysRevLett.112.016402
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Disordered strong and weak topological insulators
K. Kobayashi, T. Ohtsuki, K.-I. Imura
Phys. Rev. Lett. 110, 236803 (2013)
DOI: 10.1103/PhysRevLett.110.236803
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Critical exponent for the quantum spin Hall transition in Z2 network model
K. Kobayashi, T. Ohtsuki, K. Slevin
International Journal of Modern Physics: Conference Series 11 (2012) 114-119
DOI: 10.1142/S2010194512005995
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Universality classes and the Anderson transition in two dimensions
T. Ohtsuki, K. Kobayashi, and K. Slevin
Soryushiron kenkyu 10 (2011)
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Conductance distributions in disordered quantum spin-Hall systems
K. Kobayashi, T. Ohtsuki, H. Obuse, K. Slevin
Phys. Rev. B (2010) 165301
DOI: 10.1103/PhysRevB.82.165301
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Point-Contact Conductance in Asymmetric Chalker-Coddington Network Model
K. Kobayashi, T. Ohtsuki, K. Slevin
J. Phys. Soc. Jpn. 78 (2009) 084708
DOI: 10.1143/JPSJ.78.084708
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Transport properties in network models with perfectly conducting channels
K. Kobayashi, K. Hirose, H. Obuse, T. Ohtsuki, K. Slevin
J. Phys.: Conf. Ser. 150 (2009) 022041
DOI: 10.1088/1742-6596/150/2/022041