Publications

[46]  Emergence of ferroelectric topological insulator as verified by quantum Hall effect of surface states in (Sn,Pb,In)Te films

R. Yoshimi, R. Kurihara, Y. Okamura, H. Handa, N. Ogawa, M. Kawamura, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, Y. Takahashi, M. Tokunaga, and Y. Tokura

Physical Review Letters 134, 176602 (2025).

[45] Synthesis of a semimetallic Weyl ferromagnet with point Fermi surface

I. Belopolski, R. Watanabe, Y. Sato, R. Yoshimi, M. Kawamura, S. Nagahama, Y. Zhao, S. Shao, Y. Jin, Y. Kato, Y. Okamura, X. -X. Zhang, Y. Fujishiro, Y. Takahashi, M. Hirschberger, A. Tsukazaki, K. S. Takahashi, C. -K. Chiu, G. Chang, M. Kawasaki, N. Nagaosa, and Y. Tokura 

Nature 637, 1078-1083 (2025).

[44] Photogalvanic spectroscopy on MnBi2Te4 topological insulator thin films

T. Takagi, R.Watanabe, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M.Kawasaki, Y. Tokura, and N. Ogawa 

Applied Physics Letters 124, 163102 (2024).

[43] Molecular beam epitaxy of superconducting  FeSexTe1-x thin films interfaced with magnetic topological insulators

Y. Sato, S. Nagahama, I. Belopolski, R. Yoshimi, M. Kawamura, A. Tsukazaki, N. Kanazawa, K. S. Takahashi, M.Kawasaki, and Y. Tokura.

Physical Review Materials 8, L041801 (2024).

[42] Terahertz field driven giant nonlinear phonon response in ferroelectric semiconductor In-doped (Sn,Pb)Te

H. Handa, Y. Okamura, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, Y. Tokura, and Y. Takahashi 

Physical Review B 109, L081102 (2024).

[41] Gate-electric-field and magnetic-field control of versatile topological phases in a semi-magnetic topological insulator

R. Watanabe, R. Yoshimi, K. S. Takahashi, A. Tsukazaki, M. Kawasaki M. Kawamura and Y. Tokura

Applied Physics Letters 123, 183102 (2023).

[40] Laughlin charge pumping in a quantum anomalous Hall insulator

M. Kawamura, M. Mogi, R. Yoshimi, T. Morimoto, K. S. Takahashi, A. Tsukazaki, N. Nagaosa, M. Kawasaki and Y. Tokura

Nature Physics 19, 333-337 (2023).

[39] Terahertz lattice and charge dynamics in ferroelectric semiconductor SnxPb1-xTe

Y. Okamura, H. Handa, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, Y. Tokura, and Y. Takahashi.

npj Quantum Materials 7, 91 (2022) (arXiv)

[38] Nonreciprocal charge transport in topological superconductor candidate Bi2Te3/PdTe2 heterostructure

M. Masuko, M. Kawamura, R. Yoshimi, M. Hirayama, Y. Ikeda, R. Watanabe, J. -J. He, D. Maryenko, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, N. Nagaosa, and Y. Tokura

npj Quantum Materials 7, 104 (2022)

[37] Nonreciprocal electrical transport in multiferroic semiconductor (Ge,Mn)Te

R. Yoshimi, M. Kawamura, K. Yasuda, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, and Y. Tokura.

Physical Review B 106, 115202 (2022). 

[36] Optical anomalous Hall effect enhanced by flat bands in ferromagnetic van der Waals semimetal

Y. D. Kato, Y. Okamura, S. Minami, R. Fujimura, M. Mogi, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, R. Arita, Y. Tokura and Y. Takahashi.

npj Quantum Materials, 7, 72 (2022). 

[35] Experimental signature of the parity anomaly in a semi-magnetic topological insulator

M. Mogi, Y. Okamura, M. Kawamura, R. Yoshimi, K. Yasuda, A. Tsukazaki, K. S. Takahashi, T. Morimoto, N. Nagaosa, M. Kawasaki, Y. Takahashi, and Y. Tokura

Nature Physics 18, 390-394 (2022).

[34] Enhancement of anomalous Hall effect in epitaxial thin films of intrinsic magnetic topological insulator MnBi2Te4 with Fermi-level tuning

R. Watanabe, R. Yoshimi, M. Kawamura, Y. Kaneko, K. S. Takahashi, A. Tsukazaki, M. Kawasaki, and Y. Tokura

Applied Physics Letters 120, 031901 (2022).

[33] Quantum anomalous Hall effect with a permanent magnet defines a quantum resistance standard

Y. Okazaki, T. Oe, M. Kawamura, R. Yoshimi, S. Nakamura, S. Takada, M. Mogi, K. S. Takahashi, A. Tsukazaki, M. Kawasaki, Y. Tokura, and N.-H. Kaneko

Nature Physics 18, 25-29 (2022).

[32] Versatile electronic states in epitaxial thin films of (Sn-Pb-In) Te: from topological crystalline insulator and polar semimetal to superconductor

R. Yoshimi, M. Masuko, N. Ogawa, M. Kawamura, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, and Y. Tokura

Physical Review Materials 5, 094202 (2021). (arXiv) 

[31] Current-induced magnetization switching at charge-transferred interface between topological insulator (Bi,Sb)2Te3 and van der Waals ferromagnet Fe3GeTe2

R. Fujimura, R. Yoshimi, M. Mogi, A. Tsukazaki, M. Kawamura, K. S. Takahashi, M. Kawasaki, and Y. Tokura

Applied Physics Letters 119, 032402 (2021).

[30] Current-induced switching of proximity-induced ferromagnetic surface states in a topological insulator

M. Mogi, K. Yasuda, R. Fujimura, R. Yoshimi, N. Ogawa, A. Tsukazaki, M. Kawamura, K. S. Takahashi, M. Kawasaki, and Y. Tokura

Nature Communications. 12, 1404 (2021).

[29] Molecular beam epitaxy of superconducting Sn1−xInxTe thin films

M. Masuko, R. Yoshimi, A. Tsukazaki, M. Kawamura, K. S. Takahashi, M. Kawasaki, and Y. Tokura

Physical Review Materials 4, 091202(Rapid Communications) (2020).

[28] Current scaling of the topological quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator

M. Kawamura, M. Mogi, R. Yoshimi, A. Tsukazaki, Y. Kozuka, K.  S. Takahashi, M. Kawasaki, and Y. Tokura

Physical Review B 4, 041301 (2020).

[27] Large non-reciprocal charge transport mediated by quantum anomalous Hall edge states

K. Yasuda, T. Morimoto, R. Yoshimi, M. Mogi, A. Tsukazaki, M. Kawamura, K. S. Takahashi, M. Kawasaki, and Y. Tokura

Nature Nanotechnology, 15, 831-835 (2020).

[26] Precise resistance measurement of quantum anomalous Hall effect in magnetic heterostructure film of topological insulator

Y. Okazaki, T. Oe, M. Kawamura, R. Yoshimi, S. Nakamura, S. Takada, M. Mogi, K. S. Takahashi, A. Tsukazaki, M. Kawasaki, Y. Tokura and N.-H. Kaneko

Applied Physics Letters 116, 143101 (2020).

[25] Quantum anomalous Hall effect driven by magnetic proximity coupling in all-telluride based heterostructure

R. Watanabe, R. Yoshimi, M. Kawamura, M. Mogi, A. Tsukazaki, X. Z. Yu, K. Nakajima, K. S. Takahashi, M. Kawasaki, Y. Tokura

Applied Physics Letters 115, 102403 (2019).

[24] Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators 

M. Mogi, T. Nakajima, V. Ukleev, A. Tsukazaki, R. Yoshimi, M. Kawamura, K. S. Takahashi, T. Hanashima, K. Kakurai, T.-H. Arima, M. Kawasaki, and Y. Tokura

Physical Review Letters 123, 016804 (2019). 

[23] Nonreciprocal charge transport at topological insulator/superconductor interface

K. Yasuda, H. Yasuda, T. Liang, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, Y. Tokura

Nature Communications 10, 2734 (2019).

[22] Current-driven magnetization switching in ferromagnetic bulk Rashba semiconductor (Ge,Mn)Te

R. Yoshimi, K. Yasuda, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, and Y. Tokura

Science Advances 4, eaat9989 (2018).

[21] Emergence of interfacial conduction and ferromagnetism in MnTe/InP

R. Watanabe, R. Yoshimi, M. Shirai, T. Tanigaki, M. Kawamura, A. Tsukazaki, K. S. Takahashi, R. Arita, M. Kawasaki, and Y. Tokura

Applied Physics Letters 113, 181602 (2018).

[20] Topological quantum phase transition in magnetic topological insulator upon magnetization rotation

M. Kawamura, M. Mogi, R. Yoshimi, A. Tsukazaki, Y. Kozuka, K. S. Takahashi, M. Kawasaki and Y. Tokura

Physical Review B (Rapid Communications) 98, 140404(R) (2018).

[19] Ferromagnetic insulator Cr2Ge2Te6 thin films with perpendicular remanence 

M. Mogi, A. Tsukazaki, Y. Kaneko, R. Yoshimi, K. S. Takahashi, M. Kawasaki and Y. Tokura

APL Materials 6, 091104 (2018). 

[18] Quantized chiral edge conduction on reconfigurable domain walls of a magnetic topological insulator

K. Yasuda, M. Mogi, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, F. Kagawa and Y. Tokura

Science 358, 1311-1314 (2017). (arXiv)

[17] Tailoring tricolor structure of magnetic topological insulator for robust axion insulator

M. Mogi, M. Kawamura, A. Tsukazaki, R. Yoshimi, K. S. Takahashi, M. Kawasaki and Y. Tokura

Science Advances 3(10), eaao1669 (2017). (arXiv)        

[16]  Current-nonlinear Hall effect and spin-orbit torque magnetization switching in a magnetic topological insulator

K .Yasuda, A. Tsukazaki, R. Yoshimi, K. Kondou, K. S. Takahashi, Y. Otani, M. Kawasaki and Y. Tokura

Physical Review Letters 119, 137204 (2017). 

[15]  Current-Driven Instability of the Quantum Anomalous Hall Effect in Ferromagnetic Topological Insulators

M. Kawamura, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Kawasaki and Y. Tokura

Physical Review Letters 119, 016803 (2017). 

[14]  A magnetic heterostructure of topological insulators as a candidate for an axion insulator

M. Mogi, M. Kawamura, R. Yoshimi, A. Tsukazaki, Y. Kozuka, N. Shirakawa, K. S. Takahashi, M. Kawasaki and Y. Tokura

Nature Materials 16, 516-521 (2017). 

[13]  Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator

K. Yasuda, A. Tsukazaki, R. Yoshimi, K. S. Takahashi, M. Kawasaki and Y. Tokura

Physical Review Letters 117, 127202 (2016). (arXiv)

[12]  Terahertz spectroscopy on Faraday and Kerr rotations in a quantum anomalous Hall state

K. N. Okada, Y. Takahashi, M. Mogi, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, N. Ogawa, M. Kawasaki and Y. Tokura

Nature Communications 7, 12245 (2016). (arXiv)

[11]  Fermi level dependent charge-to-spin current conversion by Dirac surface state of topological insulators

K. Kondou, R. Yoshimi, A. Tsukazaki, Y. Fukuma, J. Matsuno, K. S. Takahashi, M. Kawasaki, Y. Tokura and Y. Otani

Nature Physics 12, 1027-1031 (2016). (arXiv)

[10]  Zero-bias photocurrent in ferromagnetic topological insulator

N. Ogawa, R. Yoshimi, K. Yasuda, A. Tsukazaki, M. Kawasaki, and Y. Tokura

Nature Communications 7, 12246 (2016).

[9]    Geometric Hall effects in topological insulator heterostructures

K. Yasuda, R. Wakatsuki, T. Morimoto, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Ezawa, M. Kawasaki and Y. Tokura

Nature Physics 12, 555-559 (2016). 

[8]    Enhanced photogalvanic current in topological insulators via Fermi energy tuning

K. N. Okada, N. Ogawa, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Kawasaki and Y. Tokura

Physical Review B (Rapid Communications) 93, 081403(R) (2016). (arXiv)

[7]    Magnetic modulation doping in topological insulators toward higher-temperature quantum anomalous Hall effect

M. Mogi, R. Yoshimi, A. Tsukazaki, K. Yasuda, Y. Kozuka, K. S. Takahashi, M. Kawasaki and Y. Tokura

Applied Physics Letters 107, 182401 (2015). (arXiv)

[6]    Quantum Hall states stabilized in semi-magnetic bilayers of topological insulators

R. Yoshimi, K. Yasuda, A. Tsukazaki, K. S. Takahashi, N. Nagaosa, M. Kawasaki and Y. Tokura

Nature Communications 6, 8530 (2015). (arXiv)

[5]    Quantum Hall effect on top and bottom surface states of topological insulator (Bi1-xSbx)2Te3 films

R. Yoshimi, A. Tsukazaki, Y. Kozuka, J. Falson, K. S. Takahashi, J. G. Checkelsky, N. Nagaosa, M. Kawasaki and Y. Tokura

Nature Communications 6, 6627 (2015). (arXiv)

[4]    Trajectory of the anomalous Hall effect towards the quantized state in a ferromagnetic topological insulator

J. G. Checkelsky, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, Y. Kozuka, J. Falson, M. Kawasaki and Y. Tokura

Nature Physics 10, 731-736 (2014). (arXiv)

[3]    Dirac electron states formed at the heterointerface between a topological insulator and a conventional semiconductor

R. Yoshimi, A. Tsukazaki, K. Kikutake, J. G. Checkelsky, K. S. Takahashi, M. Kawasaki and Y. Tokura

Nature Materials 13, 253-257 (2014).

[2]    Gate control of surface transport in MBE-grown topological insulator (Bi1-xSbx)2Te3 thin films

S. Shimizu, R. Yoshimi, T. Hatano, K. S. Takahashi, A. Tsukazaki, M. Kawasaki, Y. Iwasa and Y. Tokura

Physical Review B 86, 045319 (2012).

[1]    Pulsed Laser Deposition and Ionic Liquid Gate Control of Epitaxial Bi2Se3 Thin Films

Y. Onose, R. Yoshimi, A. Tsukazaki, H. T. Yuan, T. Hidaka, Y. Iwasa, M. Kawasaki and Y. Tokura

Applies Physics Express 4, 083001 (2011).

[4]　トポロジカル絶縁体デバイス：新しいエレクトロニクスの指導原理

吉見龍太郎

ケミカルエンジニアリング, 8,  491-500 (2020).

[3]    トポロジカル絶縁体における量子ホール効果と量子異常ホール効果の観測

        吉見龍太郎, 川村稔, 塚崎敦

        固体物理, 53, 639-648 (2018)

[2]    トポロジカル絶縁体における量子異常ホール効果

        吉見龍太郎, 塚崎敦, 川﨑雅司, 十倉好紀

        固体物理, 52, 235-248 (2017)

[1]    トポロジカル絶縁体の新たな表面ディラック量子現象

        吉見龍太郎, 川﨑雅司

        パリティ, 31, 30-32 (2016)