発表論文

原著論文 （査読付き）

77.   “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, Appl. Phys. Lett. 124 ,163102 (2024).

76.  “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, Phys. Rev. Materials 8, L041801 (2024).

75.   “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, Phys. Rev. B 109(8), L081102 (2024).

74.    “Metal-insulator transitions in strained single quantum wells of Sr1-xLaxVO3” K. S. Takahashi,  J. Iguchi, Y. Tokura, and M. Kawasaki, Phys. Rev. B 109(3), 035158 (2024).

73.      “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, Appl. Phys. Lett. 123, 183102 (2023).

72.      “Evolution of ferromagnetism and electron correlation in Eu1-xGdxTiO3 thin films with 4f7 configuration” N. Takahara, K. S. Takahashi, Y. Tokura, M. Kawasaki, Phys. Rev. B 108, 125138 (2023).

71.      “Superconductivity at epitaxial LaTiO3-KTaO3 interfaces” D. Maryenko, I. V. Maznichenko, S.  Ostanin, M. Kawamura, K. S. Takahashi, M. Nakamura, V. K. Dugaev, E. Y. Sherman, A. Ernst, and M. Kawasaki, APL Materials 11, 061102 (2023).

70.      “Magnetic and transport properties of electron doped EuTiO3 thin films with La3+ (4f0) or Gd3+ (4f7) donors grown by gas source molecular beam epitaxy” N. Takahara, K. S. Takahashi, K. Maruhashi, Y. Tokura, and M. Kawasaki, APL Materials 11, 031101 (2023).

69.       “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 (2023).

68.        “Metal-insulator transitions in dimensionality controlled LaxSr1-xVO3 films” K. S. Takahashi, Y. Tokura, and M. Kawasaki, APL Materials 10, 111114 (2022).

67.       “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, Y. Tokura, npj Quantum Mater. 7, 104 (2022).

67.       “Nonreciprocal electrical transport in the multiferroic semiconductor (Ge,Mn)Te” R. Yoshimi, M. Kawamura, K. Yasuda, A. Tsukazaki, K. S. Takahashi, M. Kawasaki, and Y. Tokura, Phys. Rev. B 106, 115202 (2022).

66.       “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 Mater. 7, 91 (2022).

65.      “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 Mater. 7, 73 (2022).

64.      “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 (2022).  

63.       “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, Appl. Phys. Lett. 120, 031901 (2022).

62.     “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, N. H. Kaneko, Nature Physics 18, 25 (2022).

61.     “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, Phys. Rev. Lett. 5, 094202 (2021).

60.      “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).

59.    “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, Appl. Phys. Lett. 119, 032402 (2021).

58.   “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, Phys. Rev. Materials 4, 091202 (2021).

57.     “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, Phys. Rev. B 102, 041301 (2020). 

56.     “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, N. Nagaosa, and Y. Tokura, Nature Nanotechnology DOI: 10.1038/s41565-020-0733-2 (2020). 

55.     “Anisotropic Quantum Transport through a Single Spin Channel in the Magnetic Semiconductor EuTiO3” K. Maruhashi, K. S. Takahashi, M. S. Bahramy, S. Shimizu, R. Kurihara, A. Miyake, M. Tokunaga, Y. Tokura, and M. Kawasaki, Advanced Materials 32, 1908315 (2020). 

54.     “Precise resistance measurement of quantum anomalous Hall effect in magnetic heterostructure film of topological insulator” Y. 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. Kaneko, Appl. Phys. Lett. 116, 143101 (2020). 

53.     “Characterization of Sr2RuO4 Josephson junctions made of epitaxial films” M. Uchida, I. Sakuraba, M. Kawamura, M. Ide, K. S. Takahashi, Y. Tokura, and M. Kawasaki Phys. Rev. B 101, 035107 (2020).

52.     “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, and Y. Tokura, Appl. Phys. Lett. 115, 102403 (2019).

51.     “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. Arima, M. Kawasaki, and Y. Tokura, Phys. Rev. Lett. 123, 016804 (2019). 

50.     “Nonreciprocal charge transport at topological insulator/superconductor interface” K. Yasuda, H. Yasuda, T. Liang,  R. Yoshimi, A. Tsukazaki, K. S. Takahashi, N. Nagaosa,  M. Kawasaki, and Y. Tokura, Nature Communications 10, 2734 (2019). 

49.     “Anomalous enhancement of upper critical field in Sr2RuO4 thin films” M. Uchida, M. Ide, M. Kawamura, K. S. Takahashi, Y. Tokura, and M. Kawasaki, Phys. Rev. B 99, 161111(R) (2019). 

48.     “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).

47.       “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, Appl. Phys. Lett. 113 181602-1−181602-4 (2018). 

46.       “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,  Phys. Rev. B 98, 140404-1−140404-5 (2018) 

45.       “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 Mater. 6, 091104-1−091104-8 (2018). 

44.      “Anomalous Hall effect derived from multiple Weyl nodes in high-mobility EuTiO3 films” K. S. Takahashi, H. Ishizuka, T. Murata, Q. Y. Wang, Y. Tokura, N. Nagaosa, M. Kawasaki, Science Advances 4, eaar7880 (2018) .

43.      “Quantized chiral edge conduction on 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 (2017).

42.      “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, eaao1669 (2017).

41.      “Molecular beam epitaxy growth of superconducting Sr2RuO4 films” M. Uchida, M. Ide, H. Watanabe, K. S. Takahashi, Y. Tokura, and M. Kawasaki, APL Mater. 5, 106108 (2017).

40.      “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, Phys. Rev. Lett. 119, 137204 (2017).

39.      “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, Phys. Rev. Lett. 119, 016803 (2017).

38.     “Polar metal phase stabilized in strained La-doped BaTiO3 films” K. S. Takahashi, Y. Matsubara, M. S. Bahramy, N. Ogawa, D. Hashizume, Y. Tokura, and M. Kawasaki, Scientific Reports 7, 4631 (2017).

37.       “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 (2017). 

36.      “Fermi-level-dependent charge-to-spin current conversion by Dirac surface states 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). 

35.      “Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator”, K. Yasuda, A. Tsukazaki, R. Yoshimi, K. S. Takahashi, M. Kawasaki, and Y. Tokura, Phys. Rev. Lett. 117, 127202 (2016). 

34.   “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).

33.   “Weyl fermions and spin dynamics of metallic ferromagnet SrRuO3”, S. Itoh, Y. Endoh, T. Yokoo, S. Ibuka, J.-G. Park, Y. Kaneko, K. S. Takahashi, Y. Tokura, and N. Nagaosa, Nature Communications 7, 11788 (2016). 

32.   “Geometric Hall effects in topological insulator heterostructures”, K. Yasuda, R. Wakatsuki, T. Morimoto, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, M. Ezawa, M. Kawasaki, N. Nagaosa, and Y. Tokura, Nature Physics 12, 555-560 (2016). 

31.   “Observation of the quantum Hall effect in d-doped SrTiO3”, Y. Matsubara, K. S. Takahashi, M. S. Bahramy, Y. Kozuka, D. Maryenko, J. Falson, A. Tsukazaki, Y. Tokura, and M. Kawasaki, Nature Communications 7, 11631 (2016). 

30.   “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, Phys. Rev. B 93, 081403(R) (2016). 

29.   “Effective carrier doping and metallization in LaxSr2-x-yBayIrO4-delta thin films”, M. Ito, M. Uchida, Y. Kozuka, K. S. Takahashi, and M. Kawasaki, Phys. Rev. B 93, 045139 (2016). 

28.   “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, Appl. Phys. Lett. 107, 182401 (2015). 

27.   “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). 

26.   “Field-direction control of the type of charge carriers in nonsymmorphic IrO2”, M. Uchida, W. Sano, K. S. Takahashi, T. Koretsune, Y. Kozuka, R. Arita, Y. Tokura, and M. Kawasaki, Phys. Rev. B 91, 241119 (2015). 

25.   “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). 

24.   “Discretized topological Hall effect emerging from skyrmions in constricted geometry”, N. Kanazawa, M. Kubota, A. Tsukazaki, Y. Kozuka, K. S. Takahashi, M. Kawasaki, M. Ichikawa, F. Kagawa, and Y. Tokura, Phys. Rev. B 91, 041122(R) (2015). 

23.   “Single-crystalline BaTiO3 films grown by gas-source molecular beam epitaxy”, Y. Matsubara, K. S. Takahashi, Y. Tokura, and M. Kawasaki, Appl. Phys. Express 7, 125502 (2014). 

22.   “Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund's rule coupling and possible plasmonic sideband”, H. Wadati, J. Mravlje, K. Yoshimatsu, H. Kumigashira, M. Oshima, T. Sugiyama, E. Ikenaga, A. Fujimori, A. Georges, A. Radetinac, K. S. Takahashi, M. Kawasaki, and Y. Tokura, Phys. Rev. B 90, 205131 (2014). 

21.   “Gate tuning of anomalous Hall effect in ferromagnetic metal SrRuO3”, S. Shimizu, K. S. Takahashi, M. Kubota, M. Kawasaki, Y. Tokura, and Y. Iwasa, Appl. Phys. Lett. 105, 163509 (2014). 

20.   “Trajectory of 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). 

19.   “Electric double layer transistors with ferroelectric BaTiO3 channels”, M. Ito, Y. Matsubara, Y. Kozuka, K. S. Takahashi, F. Kagawa, J. T. Ye, Y. Iwasa, K. Ueno, Y. Tokura, and M. Kawasaki, Appl. Phys. Lett. 104, 222101 (2014). 

18.   “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). 

17.   “Electrically tunable anomalous Hall effect in Pt thin films”, S. Shimizu, K. S. Takahashi, T. Hatano, M. Kawasaki, and Y. Tokura, Phys. Rev. Lett. 111, 216803 (2013). 

16.   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, Phys. Rev. B 86, 045319 (2012). 

15.   “Insulator-metal transition driven by change of doping and spin-orbit interaction in Sr2IrO4”, J. S. Lee, Y. Krockenberger, K. S. Takahashi, M. Kawasaki, and Y. Tokura, Phys. Rev. B 85, 035101 (2012). 

14.   “Terahertz Faraday rotation induced by an anomalous Hall effect in the itinerant ferromagnet SrRuO3”, R. Shimano, Y. Ikebe, K. S. Takahashi, M. Kawasaki, N. Nagaosa, and Y. Tokura, Euro. Phys. Lett. 95, 17002 (2011). 

13.   “Single-crystalline Sr2MoO4 films as prepared by pulsed laser deposition”, A. Radetinac, K. S. Takahashi, L. Alff, M. Kawasaki, and Y. Tokura, Journal of crystal growth 322, 38-40 (2011). 

12.   “Growth of superconducting Sr2RuO4 thin films”, Y. Krockenberger, M. Uchida, K. S. Takahashi, M. Nakamura, M. Kawasaki, and Y. Tokura, Appl. Phys. Lett. 97, 082502 (2011). 

11.   “Control of orbital ordered state in strained Nd0.25Sr1.75MnO4 films”, K. S. Takahashi, J. Fujioka, Y. Ida, M. Kawasaki, and Y. Tokura, Appl. Phys. Lett. 96, 202508 (2010). 

10.   “Single-Crystalline CaMoO3 and SrMoO3 Films Grown by Pulsed Laser Deposition in a Reductive Atmosphere”, A. Radetinac, K. S. Takahashi, L. Alff, M. Kawasaki, and Y. Tokura, Appl. Phys. Express 3, 073003 (2010). 

9.   “Control of the Anomalous Hall Effect by Doping in Eu1-xLaxTiO3 Thin Films”, K. S. Takahashi, M. Onoda, M. Kawasaki, N. Nagaosa, and Y. Tokura, Phys. Rev. Lett. 103, 057204 (2009). 

8.   “Carrier doping in anatase TiO2 film by perovskite overlayer deposition”, K. S. Takahashi and H. Y. Hwang, Appl. Phys. Lett. 93, 082112 (2008). 

7.   “Local switching of two-dimensional superconductivity using the ferroelectric field effect”, K. S. Takahashi, M. Gabay, D. Jaccard, K. Shibuya, T. Ohnishi, M. Lippmaa, and J.-M. Triscone, Nature 441, 195-198 (2006). 

6.   “General features of photoinduced spin dynamics in ferromagnetic and ferrimagnetic compounds”, T. Ogasawara, K. Ohgushi, Y. Tomioka, K. S. Takahashi, H. Okamoto, M. Kawasaki, and Y. Tokura, Phys. Rev. Lett. 94, 087202 (2005). 

5.   “Scaling of the anomalous Hall effect in Sr1-xCaxRuO3”, R. Mathieu, A. Asamitsu, H. Yamada, K. S. Takahashi, M. Kawasaki, Z. Fang, N. Nagaosa, and Y. Tokura, Phys. Rev. Lett. 93, 016602 (2004). 

4.   “Electrostatic modulation of the electronic properties of Nb-doped SrTiO3 superconducting films”, K. S. Takahashi, D. Matthey, D. Jaccard, J.-M. Triscone, K. Shibuya, T. Ohnishi, and M. Lippmaa, Appl. Phys. Lett. 84, 1722-1724 (2004). 

3.   “The anomalous Hall effect and magnetic monopoles in momentum space”, Z. Fang, N. Nagaosa, K. S. Takahashi, A. Asamitsu, R. Mathieu, T. Ogasawara, H. Yamada, M. Kawasaki, Y. Tokura, and K. Terakura, Science 302, 92-95 (2003). 

2.   “Inverse tunnel magnetoresistance in all-perovskite junctions of La0.7Sr0.3MnO3/SrTiO3/SrRuO3”, K. S. Takahashi, A. Sawa, Y. Ishii, H. Akoh, M. Kawasaki, and Y. Tokura, Phys. Rev. B 67, 094413 (2003). 

1.   “Interface ferromagnetism in oxide superlattices of CaMnO3/CaRuO3”, K. S. Takahashi, M. Kawasaki, and Y. Tokura, Appl. Phys. Lett. 79, 1324-1326 (2001)