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小塚 裕介

小塚 裕介 (KOZUKA, Yusuke) 0000-0001-7674-600X

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305-0047 茨城県つくば市千現1-2-1 [アクセス]
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論文 TSV

2023
  1. Yusuke Kozuka, Taisuke T. Sasaki, Terumasa Tadano, Jun Fujioka. Epitaxy and transport properties of alkali-earth palladate thin films. Science and Technology of Advanced Materials. 24 [1] (2023) 2265431 10.1080/14686996.2023.2265431 Open Access
  2. Kouta Kazama, Masato Sakano, Kohei Yamagami, Takuo Ohkochi, Kyoko Ishizaka, Terumasa Tadano, Yusuke Kozuka, Hidetoshi Yoshizawa, Yoshihiro Tsujimoto, Kazunari Yamaura, Jun Fujioka. Charge transport and thermopower in the electron-doped narrow gap semiconductor Ca1−xLaxPd3O4. Physical Review Materials. 7 [8] (2023) 085402 10.1103/physrevmaterials.7.085402 Open Access
  3. Saikat Das, Satoshi Sugimoto, Varun Kumar Kushwaha, Yusuke Kozuka, Shinya Kasai. Observation of charge-to-spin conversion with giant efficiency at Ni0.8Fe0.2/Bi2WO6 interface. APL Materials. 11 [4] (2023) 041113 10.1063/5.0142695 Open Access
2022
  1. Shinji Isogami, Mitsuru Ohtake, Yusuke Kozuka, Yukiko K. Takahashi. Wide modulation of coercive fields in Mn4N ferrimagnetic thin films caused dominantly by dislocation microstructures. Journal of Magnetism and Magnetic Materials. 560 (2022) 169642 10.1016/j.jmmm.2022.169642
  2. Vasileios Niaouris, Mikhail V. Durnev, Xiayu Linpeng, Maria L. K. Viitaniemi, Christian Zimmermann, Aswin Vishnuradhan, Yusuke Kozuka, Masashi Kawasaki, Kai-Mei C. Fu. Ensemble spin relaxation of shallow donor qubits in ZnO. Physical Review B. 105 [19] (2022) 195202 10.1103/physrevb.105.195202
  3. J. Falson, I. Sodemann, B. Skinner, D. Tabrea, Y. Kozuka, A. Tsukazaki, M. Kawasaki, K. von Klitzing, J. H. Smet. Competing correlated states around the zero-field Wigner crystallization transition of electrons in two dimensions. Nature Materials. 21 [3] (2022) 311-316 10.1038/s41563-021-01166-1
2021
  1. D. Maryenko, M. Kawamura, A. Ernst, V. K. Dugaev, E. Ya. Sherman, M. Kriener, M. S. Bahramy, Y. Kozuka, M. Kawasaki. Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system. Nature Communications. 12 [1] (2021) 3180 10.1038/s41467-021-23483-4 Open Access
  2. Shinji Isogami, Nagalingam Rajamanickam, Yusuke Kozuka, Yukiko K. Takahashi. Efficient current-driven magnetization switching owing to isotropic magnetism in a highly symmetric 111-oriented Mn4N epitaxial single layer. AIP Advances. 11 [10] (2021) 105314 10.1063/5.0062253 Open Access
  3. Y. Kozuka, S. Isogami, K. Masuda, Y. Miura, Saikat Das, J. Fujioka, T. Ohkubo, S. Kasai. Observation of Nonlinear Spin-Charge Conversion in the Thin Film of Nominally Centrosymmetric Dirac Semimetal SrIrO3 at Room Temperature. Physical Review Letters. 126 [23] (2021) 236801 10.1103/physrevlett.126.236801 Open Access
  4. Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi, Yusuke Kozuka, Yukiko K. Takahashi, Shinya Kasai, Kensuke Kobayashi. Negative correlation between the linear and the nonlinear conductance in magnetic tunnel junctions. Physical Review B. 103 [24] (2021) 245427 10.1103/physrevb.103.245427
  5. Saikat Das, Tadakatsu Ohkubo, Shinya Kasai, Yusuke Kozuka. Deterministic Influence of Substrate-Induced Oxygen Vacancy Diffusion on Bi2WO6 Thin Film Growth. Crystal Growth & Design. 21 [1] (2021) 625-630 10.1021/acs.cgd.0c01428
2020
  1. D. Tabrea, I. A. Dmitriev, S. I. Dorozhkin, B. P. Gorshunov, A. V. Boris, Y. Kozuka, A. Tsukazaki, M. Kawasaki, K. von Klitzing, J. Falson. Microwave response of interacting oxide two-dimensional electron systems. Physical Review B. 102 [11] (2020) 115432 10.1103/physrevb.102.115432 Open Access
  2. Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi, Kensuke Kobayashi, Yusuke Kozuka, Yukiko K. Takahashi, Shinya Kasai. Generation of multipeak spectrum of spin torque oscillator in non-linear regime. Applied Physics Letters. 117 [2] (2020) 022406 10.1063/5.0013102
  3. Minoru Kawamura, Masataka Mogi, Ryutaro Yoshimi, Atsushi Tsukazaki, Yusuke Kozuka, Kei S. Takahashi, Masashi Kawasaki, Yoshinori Tokura. Current scaling of the topological quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator. Physical Review B. 102 [4] (2020) 041301 10.1103/physrevb.102.041301
  4. Satoshi Sugimoto, Shuichi Iwakiri, Yusuke Kozuka, Yukiko Takahashi, Yasuhiro Niimi, Kensuke Kobayashi, Shinya Kasai. Multiple modes of a single spin torque oscillator under the non-linear region. AIP Advances. 10 [7] (2020) 075115 10.1063/5.0013105 Open Access
2019
  1. K. Tanaka, J. Falson, Y. Kozuka, M. Uchida, D. Maryenko, J. T. Ye, Y. Iwasa, A. Tsukazaki, J. H. Smet, M. Kawasaki. Ballistic transport in periodically modulated MgZnO/ZnO two-dimensional electron systems. Applied Physics Letters. 115 [15] (2019) 153101 10.1063/1.5121005
  2. Masaki Uchida, Motoharu Ide, Minoru Kawamura, Kei S. Takahashi, Yusuke Kozuka, Yoshinori Tokura, Masashi Kawasaki. Anomalous enhancement of upper critical field in Sr2RuO4 thin films. Physical Review B. 99 [16] (2019) 161111 10.1103/physrevb.99.161111 Open Access
  3. H. Hou, Y. Kozuka, Jun-Wei Liao, L. W. Smith, D. Kos, J. P. Griffiths, J. Falson, A. Tsukazaki, M. Kawasaki, C. J. B. Ford. Quantized conductance of one-dimensional strongly correlated electrons in an oxide heterostructure. Physical Review B. 99 [12] (2019) 121302 10.1103/physrevb.99.121302 Open Access
  4. N. Kanazawa, J. S. White, H. M. Rønnow, C. D. Dewhurst, D. Morikawa, K. Shibata, T. Arima, F. Kagawa, A. Tsukazaki, Y. Kozuka, M. Ichikawa, M. Kawasaki, Y. Tokura. Erratum: Topological spin-hedgehog crystals of a chiral magnet as engineered with magnetic anisotropy (Physical Review B (2017) (96) (220414) DOI: 10.1103/PhysRevB.96.220414). Physical Review B. 99 [8] (2019) 089902 10.1103/physrevb.99.089902
2018
  1. Yusuke Kozuka, Atsushi Sakaguchi, Joseph Falson, Atsushi Tsukazaki, Masashi Kawasaki. Andreev Reflection at the Interface with an Oxide in the Quantum Hall Regime. Journal of the Physical Society of Japan. 87 [12] (2018) 124712 10.7566/jpsj.87.124712
  2. Xiayu Linpeng, Maria L.K. Viitaniemi, Aswin Vishnuradhan, Y. Kozuka, Cameron Johnson, M. Kawasaki, Kai-Mei C. Fu. Coherence Properties of Shallow Donor Qubits in ZnO. Physical Review Applied. 10 [6] (2018) 064061 10.1103/physrevapplied.10.064061 Open Access
  3. Yusuke Nakazawa, Masaki Uchida, Shinichi Nishihaya, Markus Kriener, Yusuke Kozuka, Yasujiro Taguchi, Masashi Kawasaki. Structural characterisation of high-mobility Cd3As2 films crystallised on SrTiO3. Scientific Reports. 8 [1] (2018) 2244 10.1038/s41598-018-20758-7 Open Access
  4. Yuki Ohuchi, Jobu Matsuno, Naoki Ogawa, Yusuke Kozuka, Masaki Uchida, Yoshinori Tokura, Masashi Kawasaki. Electric-field control of anomalous and topological Hall effects in oxide bilayer thin films. Nature Communications. 9 [1] (2018) 213 10.1038/s41467-017-02629-3 Open Access
  5. D. Maryenko, A. McCollam, J. Falson, Y. Kozuka, J. Bruin, U. Zeitler, M. Kawasaki. Composite fermion liquid to Wigner solid transition in the lowest Landau level of zinc oxide. Nature Communications. 9 [1] (2018) 4356 10.1038/s41467-018-06834-6 Open Access
  6. Minoru Kawamura, Masataka Mogi, Ryutaro Yoshimi, Atsushi Tsukazaki, Yusuke Kozuka, Kei S. Takahashi, Masashi Kawasaki, Yoshinori Tokura. Topological quantum phase transition in magnetic topological insulator upon magnetization rotation. Physical Review B. 98 [14] (2018) 140404 10.1103/physrevb.98.140404 Open Access
  7. Ryutaro Nishino, Yusuke Kozuka, Fumitaka Kagawa, Masaki Uchida, Masashi Kawasaki. Ferroelectric field control of charge density in oxide films with polarization reversal by electric double layer. Applied Physics Letters. 113 [14] (2018) 143501 10.1063/1.5047558
  8. Joseph Falson, Daniela Tabrea, Ding Zhang, Inti Sodemann, Yusuke Kozuka, Atsushi Tsukazaki, Masashi Kawasaki, Klaus von Klitzing, Jurgen H. Smet. A cascade of phase transitions in an orbitally mixed half-filled Landau level. Science Advances. 4 [9] (2018) eaat8742 10.1126/sciadv.aat8742 Open Access
  9. S. Nishihaya, M. Uchida, Y. Nakazawa, K. Akiba, M. Kriener, Y. Kozuka, A. Miyake, Y. Taguchi, M. Tokunaga, M. Kawasaki. Negative magnetoresistance suppressed through a topological phase transition in (Cd1−xZnx)3As2 thin films. Physical Review B. 97 [24] (2018) 245103 10.1103/physrevb.97.245103
  10. Shinichi Nishihaya, Masaki Uchida, Yusuke Nakazawa, Markus Kriener, Yusuke Kozuka, Yasujiro Taguchi, Masashi Kawasaki. Gate-tuned quantum Hall states in Dirac semimetal (Cd 1− x Zn x ) 3 As 2 . Science Advances. 4 [5] (2018) eaar5668 10.1126/sciadv.aar5668 Open Access
  11. Ryutaro Nishino, Yusuke Kozuka, Masaki Uchida, Fumitaka Kagawa, Masashi Kawasaki. Electrical conduction on the surface of ferroelectric PbTiO3 thin film induced by electrolyte gating. Applied Physics Letters. 112 [5] (2018) 051602 10.1063/1.5010391
  12. T. C. Fujita, Y. Kozuka, J. Matsuno, M. Uchida, A. Tsukazaki, T. Arima, M. Kawasaki. All-in-all-out magnetic domain inversion in Tb2Ir2O7 with molecular fields antiparallel to external fields. Physical Review Materials. 2 [1] (2018) 011402 10.1103/physrevmaterials.2.011402 Open Access
2017
  1. D. Maryenko, A. S. Mishchenko, M. S. Bahramy, A. Ernst, J. Falson, Y. Kozuka, A. Tsukazaki, N. Nagaosa, M. Kawasaki. Observation of anomalous Hall effect in a non-magnetic two-dimensional electron system. Nature Communications. 8 [1] (2017) 14777 10.1038/ncomms14777 Open Access
  2. Masaki Uchida, Yusuke Nakazawa, Shinichi Nishihaya, Kazuto Akiba, Markus Kriener, Yusuke Kozuka, Atsushi Miyake, Yasujiro Taguchi, Masashi Tokunaga, Naoto Nagaosa, Yoshinori Tokura, Masashi Kawasaki. Quantum Hall states observed in thin films of Dirac semimetal Cd3As2. Nature Communications. 8 [1] (2017) 2274 10.1038/s41467-017-02423-1 Open Access
  3. N. Kanazawa, J. S. White, H. M. Rønnow, C. D. Dewhurst, D. Morikawa, K. Shibata, T. Arima, F. Kagawa, A. Tsukazaki, Y. Kozuka, M. Ichikawa, M. Kawasaki, Y. Tokura. Topological spin-hedgehog crystals of a chiral magnet as engineered with magnetic anisotropy. Physical Review B. 96 [22] (2017) 220414 10.1103/physrevb.96.220414 Open Access
  4. Y. Kozuka, T. C. Fujita, M. Uchida, T. Nojima, A. Tsukazaki, J. Matsuno, T. Arima, M. Kawasaki. Visualizing ferroic domains in an all-in-all-out antiferromagnet thin film. Physical Review B. 96 [22] (2017) 224417 10.1103/physrevb.96.224417 Open Access
  5. Q. Shi, J. Falson, M. A. Zudov, Y. Kozuka, A. Tsukazaki, M. Kawasaki, J. Smet. Nonlinear response of a MgZnO/ZnO heterostructure close to zero bias. Physical Review B. 96 [12] (2017) 125401 10.1103/physrevb.96.125401 Open Access
  6. M. Mogi, M. Kawamura, R. Yoshimi, A. Tsukazaki, Y. Kozuka, N. Shirakawa, K. S. Takahashi, M. Kawasaki, Y. Tokura. A magnetic heterostructure of topological insulators as a candidate for an axion insulator. Nature Materials. 16 [5] (2017) 516-521 10.1038/nmat4855
  7. Q. Shi, M. A. Zudov, J. Falson, Y. Kozuka, A. Tsukazaki, M. Kawasaki, K. von Klitzing, J. Smet. Hall field-induced resistance oscillations in MgZnO/ZnO heterostructures. Physical Review B. 95 [4] (2017) 041411 10.1103/physrevb.95.041411 Open Access
  8. Aswin Vishnuradhan, Y. Kozuka, M. Uchida, J. Falson, A. Tsukazaki, M. Kawasaki. Alloy disorder modulated electron transport at MgxZn1-xO/ ZnO heterointerface. AIP Advances. 7 [1] (2017) 015029 10.1063/1.4974462 Open Access
2016
  1. Y. Matsubara, K. S. Takahashi, M. S. Bahramy, Y. Kozuka, D. Maryenko, J. Falson, A. Tsukazaki, Y. Tokura, M. Kawasaki. Observation of the quantum Hall effect in δ-doped SrTiO3. Nature Communications. 7 [1] (2016) 11631 10.1038/ncomms11631 Open Access
  2. Joseph Falson, Yusuke Kozuka, Masaki Uchida, Jurgen H. Smet, Taka-hisa Arima, Atsushi Tsukazaki, Masashi Kawasaki. MgZnO/ZnO heterostructures with electron mobility exceeding 1 × 10 6 cm 2 /Vs. Scientific Reports. 6 [1] (2016) 26598 10.1038/srep26598 Open Access
  3. N. Kanazawa, J. S. White, H. M. Rønnow, C. D. Dewhurst, Y. Fujishiro, A. Tsukazaki, Y. Kozuka, M. Kawasaki, M. Ichikawa, F. Kagawa, Y. Tokura. Direct observation of anisotropic magnetic field response of the spin helix in FeGe thin films. Physical Review B. 94 [18] (2016) 184432 10.1103/physrevb.94.184432 Open Access
  4. Shinichi Nishihaya, Masaki Uchida, Yusuke Kozuka, Yoshihiro Iwasa, Masashi Kawasaki, S. Nishihaya, M. Uchida, Y. Kozuka, Y. Iwasa, M. Kawasaki, Y. Iwasa, M. Kawasaki. Evolution of Insulator-Metal Phase Transitions in Epitaxial Tungsten Oxide Films during Electrolyte-Gating. ACS Applied Materials & Interfaces. 8 [34] (2016) 22330-22336 10.1021/acsami.6b06593
  5. Masaki Uchida, Kenta Ohba, Yuki Ohuchi, Yusuke Kozuka, Masashi Kawasaki. Epitaxially Stabilized Oxide Composed of Twisted Triangular-Lattice Layers. Chemistry of Materials. 28 [4] (2016) 1165-1169 10.1021/acs.chemmater.5b04702
  6. T. C. Fujita, M. Uchida, Y. Kozuka, W. Sano, A. Tsukazaki, T. Arima, M. Kawasaki. All-in-all-out magnetic domain wall conduction in a pyrochlore iridate heterointerface. Physical Review B. 93 [6] (2016) 064419 10.1103/physrevb.93.064419
  7. T. C. Fujita, M. Uchida, Y. Kozuka, S. Ogawa, A. Tsukazaki, T. Arima, M. Kawasaki. All-in-all-out magnetic domain size in pyrochlore iridate thin films as probed by local magnetotransport. Applied Physics Letters. 108 [2] (2016) 022402 10.1063/1.4939742
  8. D. F. Kärcher, A. V. Shchepetilnikov, Yu. A. Nefyodov, J. Falson, I. A. Dmitriev, Y. Kozuka, D. Maryenko, A. Tsukazaki, S. I. Dorozhkin, I. V. Kukushkin, M. Kawasaki, J. H. Smet. Observation of microwave induced resistance and photovoltage oscillations in MgZnO/ZnO heterostructures. Physical Review B. 93 [4] (2016) 041410 10.1103/physrevb.93.041410
  9. M. Ito, M. Uchida, Y. Kozuka, K. S. Takahashi, M. Kawasaki. Effective carrier doping and metallization in LaxSr2-x-yBayIrO4-delta thin films. Physical Review B. 93 [4] (2016) 045139 10.1103/physrevb.93.045139
2015
  1. T. C. Fujita, Y. Kozuka, M. Uchida, A. Tsukazaki, T. Arima, M. Kawasaki. Odd-parity magnetoresistance in pyrochlore iridate thin films with broken time-reversal symmetry. Scientific Reports. 5 [1] (2015) 9711 10.1038/srep09711 Open Access
  2. R. Yoshimi, A. Tsukazaki, Y. Kozuka, J. Falson, K.S. Takahashi, J.G. Checkelsky, N. Nagaosa, M. Kawasaki, Y. Tokura. Quantum Hall effect on top and bottom surface states of topological insulator (Bi1-xSbx)(2)Te-3 films. Nature Communications. 6 [1] (2015) 6627 10.1038/ncomms7627 Open Access
  3. S. Seki, T. Ideue, M. Kubota, Y. Kozuka, R. Takagi, M. Nakamura, Y. Kaneko, M. Kawasaki, Y. Tokura. Thermal Generation of Spin Current in an Antiferromagnet. Physical Review Letters. 115 [26] (2015) 266601 10.1103/physrevlett.115.266601
  4. T. Murata, Y. Kozuka, M. Uchida, M. Kawasaki. Magnetic properties of spin frustrated spinel ZnFe2O4/ZnCr2O4 superlattices. Journal of Applied Physics. 118 [19] (2015) 193901 10.1063/1.4935818
  5. M. Mogi, R. Yoshimi, A. Tsukazaki, K. Yasuda, Y. Kozuka, K. S. Takahashi, M. Kawasaki, Y. Tokura. Magnetic modulation doping in topological insulators toward higher-temperature quantum anomalous Hall effect. Applied Physics Letters. 107 [18] (2015) 10.1063/1.4935075
  6. D. Maryenko, J. Falson, M. S. Bahramy, I. A. Dmitriev, Y. Kozuka, A. Tsukazaki, M. Kawasaki. Spin-Selective Electron Quantum Transport in Nonmagnetic MgZnO/ZnO Heterostructures. Physical Review Letters. 115 [19] (2015) 197601 10.1103/physrevlett.115.197601
  7. Tomoyuki Yokouchi, Naoya Kanazawa, Atsushi Tsukazaki, Yusuke Kozuka, Akiko Kikkawa, Yasujiro Taguchi, Masashi Kawasaki, Masakazu Ichikawa, Fumitaka Kagawa, Yoshinori Tokura. Formation of In-plane Skyrmions in Epitaxial MnSi Thin Films as Revealed by Planar Hall Effect. Journal of the Physical Society of Japan. 84 [10] (2015) 104708 10.7566/jpsj.84.104708
  8. J. Falson, Y. Kozuka, J. H. Smet, T. Arima, A. Tsukazaki, M. Kawasaki. Electron scattering times in ZnO based polar heterostructures. Applied Physics Letters. 107 [8] (2015) 10.1063/1.4929381
  9. Eishi Majima, Yusuke Kozuka, Masaki Uchida, Masao Nakamura, Masashi Kawasaki. Band alignment and photovoltaic effect of epitaxial alpha-PbO thin films. Applied Physics Express. 8 [7] (2015) 074001 10.7567/apex.8.074001
  10. Y. Ohuchi, Y. Kozuka, M. Uchida, K. Ueno, A. Tsukazaki, M. Kawasaki. Topological Hall effect in thin films of the Heisenberg ferromagnet EuO. Physical Review B. 91 [24] (2015) 245115 10.1103/physrevb.91.245115
  11. M. Uchida, W. Sano, K. S. Takahashi, T. Koretsune, Y. Kozuka, R. Arita, Y. Tokura, M. Kawasaki. Field-direction control of the type of charge carriers in nonsymmorphic IrO2. Physical Review B. 91 [24] (2015) 241119 10.1103/physrevb.91.241119
  12. J. Falson, D. Maryenko, B. Friess, D. Zhang, Y. Kozuka, A. Tsukazaki, J. H. Smet, M. Kawasaki. Even-denominator fractional quantum Hall physics in ZnO. Nature Physics. 11 [4] (2015) 347-351 10.1038/nphys3259
  13. V. V. Solovyev, A. B. Van'kov, I. V. Kukushkin, J. Falson, D. Zhang, D. Maryenko, Y. Kozuka, A. Tsukazaki, J. H. Smet, M. Kawasaki. Optical probing of MgZnO/ZnO heterointerface confinement potential energy levels. Applied Physics Letters. 106 [8] (2015) 082102 10.1063/1.4913313
  14. V. E. Kozlov, A. B. Van'kov, S. I. Gubarev, I. V. Kukushkin, V. V. Solovyev, J. Falson, D. Maryenko, Y. Kozuka, A. Tsukazaki, M. Kawasaki, J. H. Smet. Microwave magnetoplasma resonances of two-dimensional electrons in MgZnO/ZnO heterojunctions. Physical Review B. 91 [8] (2015) 085304 10.1103/physrevb.91.085304
  15. Masaki Uchida, Joseph Falson, Yusaburo Segawa, Yusuke Kozuka, Atsushi Tsukazaki, Masashi Kawasaki. Calibration and control of in-plane Mg doping distribution in MgxZn1-xO/ZnO heterostructures grown by molecular beam epitaxy. Japanese Journal of Applied Physics. 54 [2] (2015) 028004 10.7567/jjap.54.028004
  16. N. Kanazawa, M. Kubota, A. Tsukazaki, Y. Kozuka, K. S. Takahashi, M. Kawasaki, M. Ichikawa, F. Kagawa, Y. Tokura. Discretized topological Hall effect emerging from skyrmions in constricted geometry. Physical Review B. 91 [4] (2015) 041122 10.1103/physrevb.91.041122
2014
  1. D. Maryenko, J. Falson, Y. Kozuka, A. Tsukazaki, M. Kawasaki. Polarization-dependent Landau level crossing in a two-dimensional electron system in a MgZnO/ZnO heterostructure. Physical Review B. 90 [24] (2014) 245303 10.1103/physrevb.90.245303
  2. J. G. Checkelsky, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, Y. Kozuka, J. Falson, M. Kawasaki, Y. Tokura. Trajectory of the anomalous Hall effect towards the quantized state in a ferromagnetic topological insulator. Nature Physics. 10 [10] (2014) 731-736 10.1038/nphys3053
  3. T. Tambo, J. Falson, D. Maryenko, Y. Kozuka, A. Tsukazaki, M. Kawasaki. Air-gap gating of MgZnO/ZnO heterostructures. Journal of Applied Physics. 116 [8] (2014) 084310 10.1063/1.4894155
  4. K. Imasaka, J. Falson, Y. Kozuka, A. Tsukazaki, M. Kawasaki. Spontaneous polarization driven Mg concentration profile reconstruction in MgZnO/ZnO heterostructures. Applied Physics Letters. 104 [24] (2014) 242112 10.1063/1.4884383
  5. M. Ito, Y. Matsubara, Y. Kozuka, K. S. Takahashi, F. Kagawa, J. T. Ye, Y. Iwasa, K. Ueno, Y. Tokura, M. Kawasaki. Electric double layer transistors with ferroelectric BaTiO3 channels. Applied Physics Letters. 104 [22] (2014) 10.1063/1.4881059
  6. Y. Kozuka, A. Tsukazaki, M. Kawasaki. Challenges and opportunities of ZnO-related single crystalline heterostructures. Applied Physics Reviews. 1 [1] (2014) 011303 10.1063/1.4853535
  7. Y. Ohuchi, Y. Kozuka, N. Rezaei, M. S. Bahramy, R. Arita, K. Ueno, A. Tsukazaki, M. Kawasaki. Photoinduced sign inversion of the anomalous Hall effect in EuO thin films. Physical Review B. 89 [12] (2014) 121114 10.1103/physrevb.89.121114
  8. T. Yokouchi, N. Kanazawa, A. Tsukazaki, Y. Kozuka, M. Kawasaki, M. Ichikawa, F. Kagawa, Y. Tokura. Stability of two-dimensional skyrmions in thin films of Mn1-xFexSi investigated by the topological Hall effect. Physical Review B. 89 [6] (2014) 064416 10.1103/physrevb.89.064416
  9. M. Brasse, S. M. Sauther, J. Falson, Y. Kozuka, A. Tsukazaki, Ch. Heyn, M. A. Wilde, M. Kawasaki, D. Grundler. Enhanced quantum oscillatory magnetization and nonequilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers. Physical Review B. 89 [7] (2014) 075307 10.1103/physrevb.89.075307
2013
  1. V. E. Kozlov, A. B. Van’kov, S. I. Gubarev, I. V. Kukushkin, J. Falson, D. Maryenko, Y. Kozuka, A. Tsukazaki, M. Kawasaki, J. H. Smet. Observation of plasma and magnetoplasma resonances of two-dimensional electrons in a single MgZnO/ZnO heterojunction. JETP Letters. 98 [4] (2013) 223-226 10.1134/s0021364013170074
  2. Y. Kozuka, S. Teraoka, J. Falson, A. Oiwa, A. Tsukazaki, S. Tarucha, M. Kawasaki. Rashba spin-orbit interaction in a MgxZn1-xO/ZnO two-dimensional electron gas studied by electrically detected electron spin resonance. Physical Review B. 87 [20] (2013) 205411 10.1103/physrevb.87.205411
  3. T. C. Fujita, Y. Kozuka, H. Seki, M. Kawasaki. Charge-spin-coupled electrical transport properties in EuMoO3/SrTiO3 superlattices. Physical Review B. 87 [20] (2013) 205402 10.1103/physrevb.87.205402
2012
  1. Y. Kasahara, Y. Oshima, J. Falson, Y. Kozuka, A. Tsukazaki, M. Kawasaki, Y. Iwasa. Correlation-Enhanced Effective Mass of Two-Dimensional Electrons in MgxZn1-xO/ZnO Heterostructures. Physical Review Letters. 109 [24] (2012) 246401 10.1103/physrevlett.109.246401
  2. Yusuke Kozuka, Hidenobu Seki, Takahiro C. Fujita, Suvankar Chakraverty, Kohei Yoshimatsu, Hiroshi Kumigashira, Masaharu Oshima, Mohammad S. Bahramy, Ryotaro Arita, Masashi Kawasaki. Epitaxially Stabilized EuMoO3: A New Itinerant Ferromagnet. Chemistry of Materials. 24 [19] (2012) 3746-3750 10.1021/cm302231k
  3. Y. Kozuka, J. Falson, Y. Segawa, T. Makino, A. Tsukazaki, M. Kawasaki. Precise calibration of Mg concentration in MgxZn1-xO thin films grown on ZnO substrates. Journal of Applied Physics. 112 [4] (2012) 043515 10.1063/1.4748306
  4. M. Kim, Y. Kozuka, C. Bell, Y. Hikita, H. Y. Hwang. Intrinsic spin-orbit coupling in superconducting delta-doped SrTiO3 heterostructures. Physical Review B. 86 [8] (2012) 085121 10.1103/physrevb.86.085121
  5. T. Makino, F. Liu, T. Yamasaki, Y. Kozuka, K. Ueno, A. Tsukazaki, T. Fukumura, Y. Kong, M. Kawasaki. Ultrafast optical control of magnetization in EuO thin films. Physical Review B. 86 [6] (2012) 064403 10.1103/physrevb.86.064403
  6. D. Maryenko, J. Falson, Y. Kozuka, A. Tsukazaki, M. Onoda, H. Aoki, M. Kawasaki. Temperature-Dependent Magnetotransport around nu=1/2 in ZnO Heterostructures. Physical Review Letters. 108 [18] (2012) 186803 10.1103/physrevlett.108.186803
  7. Y. Kozuka, A. Tsukazaki, D. Maryenko, J. Falson, C. Bell, M. Kim, Y. Hikita, H. Y. Hwang, M. Kawasaki. Single-valley quantum Hall ferromagnet in a dilute MgxZn1-xO/ZnO strongly correlated two-dimensional electron system. Physical Review B. 85 [7] (2012) 075302 10.1103/physrevb.85.075302 Open Access
  8. Yuya Matsubara, Takayuki Makino, Hiroki Hiraga, Chunlin Chen, Susumu Tsukimoto, Kazunori Ueno, Yusuke Kozuka, Yuichi Ikuhara, Masashi Kawasaki. High Crystallinity CuScO(2) Delafossite Films Exhibiting Ultraviolet Photoluminescence Grown by Vapor-Liquid-Solid Tri-phase Epitaxy. Applied Physics Express. 5 [1] (2012) 011201 10.1143/apex.5.011201
2011
  1. S. Chakraverty, K. Yoshimatsu, Y. Kozuka, H. Kumigashira, M. Oshima, T. Makino, A. Ohtomo, M. Kawasaki. Magnetic and electronic properties of ordered double-perovskite La(2)VMnO(6) thin films. Physical Review B. 84 [13] (2011) 132411 10.1103/physrevb.84.132411
  2. Joseph Falson, Denis Maryenko, Yusuke Kozuka, Atsushi Tsukazaki, Masashi Kawasaki. Magnesium Doping Controlled Density and Mobility of Two-Dimensional Electron Gas in Mg(x)Zn(1-x)O/ZnO Heterostructures. Applied Physics Express. 4 [9] (2011) 091101 10.1143/apex.4.091101
  3. Y. Ishida, H. Kanto, A. Kikkawa, Y. Taguchi, Y. Ito, Y. Ota, K. Okazaki, W. Malaeb, M. Mulazzi, M. Okawa, S. Watanabe, C.-T. Chen, M. Kim, C. Bell, Y. Kozuka, H. Y. Hwang, Y. Tokura, S. Shin. Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO(3) and Cu(x)Bi(2)Se(3). Physical Review Letters. 107 [7] (2011) 077601 10.1103/physrevlett.107.077601 Open Access
  4. M. Kim, C. Bell, Y. Kozuka, M. Kurita, Y. Hikita, H. Y. Hwang. Fermi Surface and Superconductivity in Low-Density High-Mobility delta-Doped SrTiO(3). Physical Review Letters. 107 [10] (2011) 106801 10.1103/physrevlett.107.106801 Open Access
  5. Y. Kozuka, A. Tsukazaki, D. Maryenko, J. Falson, S. Akasaka, K. Nakahara, S. Nakamura, S. Awaji, K. Ueno, M. Kawasaki. Insulating phase of a two-dimensional electron gas in Mg(x)Zn(1-x)O/ZnO heterostructures below v=1/3. Physical Review B. 84 [3] (2011) 033304 10.1103/physrevb.84.033304
2010
  1. Y. Kozuka, M. Kim, H. Ohta, Y. Hikita, C. Bell, H. Y. Hwang. Enhancing the electron mobility via delta-doping in SrTiO3. Applied Physics Letters. 97 [22] (2010) 222115 10.1063/1.3524198
  2. Y. Kozuka, Y. Hikita, C. Bell, H. Y. Hwang. Dramatic mobility enhancements in doped SrTiO3 thin films by defect management. Applied Physics Letters. 97 [1] (2010) 10.1063/1.3457994
2009
  1. C. Bell, S. Harashima, Y. Kozuka, M. Kim, B. G. Kim, Y. Hikita, H. Y. Hwang. Dominant Mobility Modulation by the Electric Field Effect at the LaAlO3/SrTiO3 Interface. Physical Review Letters. 103 [22] (2009) 226802 10.1103/physrevlett.103.226802
  2. Y. Kozuka, M. Kim, C. Bell, B. G. Kim, Y. Hikita, H. Y. Hwang. Two-dimensional normal-state quantum oscillations in a superconducting heterostructure. Nature. 462 [7272] (2009) 487-490 10.1038/nature08566
2008
  1. Y. Kozuka, T. Susaki, H. Y. Hwang. Vanishing hall coefficient in the extreme quantum limit in photocarrier-doped SrTiO3. Physical Review Letters. 101 [9] (2008) 096601 10.1103/physrevlett.101.096601
2007
  1. T. Susaki, Y. Kozuka, Y. Tateyama, H. Y. Hwang. Temperature-dependent polarity reversal in Au/Nb : SrTiO3 Schottky junctions. Physical Review B. 76 [15] (2007) 155110 10.1103/physrevb.76.155110
  2. Y. Kozuka, Y. Hikita, T. Susaki, H. Y. Hwang. Optically tuned dimensionality crossover in photocarrier-doped SrTiO3: Onset of weak localization. Physical Review B. 76 [8] (2007) 085129 10.1103/physrevb.76.085129
  3. Y. Hikita, Y. Kozuka, T. Susaki, H. Takagi, H. Y. Hwang. Characterization of the Schottky barrier in SrRuO3/Nb : SrTiO3 junctions. Applied Physics Letters. 90 [14] (2007) 143507 10.1063/1.2719157
2006
  1. Y. Kozuka, T. Susaki, H. Y. Hwang. Rectifying NdNiO3/Nb : SrTiO3 junctions as a probe of the surface electronic structure of NdNiO3. Applied Physics Letters. 88 [14] (2006) 142111 10.1063/1.2193800

書籍 TSV

会議録 TSV

2023
  1. Yuta Ishii, Yusuke Kozuka, Yuichi Yamasaki, Hironori Nakao. Development of Multi-scale Soft X-ray Diffraction Microscope for Observing Spin Textures. Proceedings of the 29th International Conference on Low Temperature Physics (LT29). (2023) 10.7566/jpscp.38.011190

口頭発表 TSV

2024
  1. ITOH, Takuma, KOZUKA, Yusuke, HIRAI, Takamasa, UCHIDA, Kenichi. Enhancement of transverse thermoelectric conversion by interface-induced thermal spin current in Ni/Bi2WO6 hybrid structure. 2024年第71回応用物理学会春季学術講演会. 2024
2023
  1. KOZUKA, Yusuke, IWASAKI, Takuya, WATANABE, Kenji, TANIGUCHI, Takashi. Stability of the helical edge states in a hBN/graphene/oxide heterostructure. MRM2023. 2023
  2. 小塚 裕介. 2次元電子系における量子ホールエッジ状態と超伝導体の界面. 日本物理学会　第78回年次大会. 2023 招待講演
  3. 吉成 朝子, 小塚 裕介, 安藤 康伸, 松村 太郎次郎, 小嗣 真人, 永村 直佳. 機械学習を活用した輝度ヒストグラム解析によるRHEED 強度振動評価. 第70回応用物理学会春季学術講演会. 2023
  4. 小塚 裕介. ２次元電子系のエッジ状態と超伝導接合. 物性研短期研究会「固体におけるエニオンと分数統計粒子研究の最前線」. 2023 招待講演
  5. 石井裕太, 山崎 裕一, 小塚 裕介, 横山優一, 水牧 仁一朗, Lustikova Jana, 新居 陽一, 小野瀬 佳文, 中尾裕則, 若林 裕助. 時分割XMCDを用いたPt/Py薄膜中の磁気歳差運動の観測. 第36回日本放射光学会年会・放射光科学合同シンポジウム. 2023
2022
  1. 野呂 康介, 熊坂 武志, 藤原 義弘, KOZUKA, Yusuke, 塚﨑 敦, 川﨑 雅司, 大塚 朋廣. Kondo Effects in ZnO Quantum Dots. 6th CRCs-5th GP-MS Symposium. 2022
  2. 小塚 裕介, 藤岡 淳, 佐々木 泰祐, 只野 央将. 結晶場狭ギャップ半導体Pd酸化物の薄膜作製. 2022年 第83回応用物理学会秋季学術講演会. 2022
  3. 野呂 康介, 熊坂 武志, 藤原 義弘, 小塚 裕介, 塚﨑 敦, 川﨑 雅司, 大塚 朋廣. 酸化亜鉛量子ドットの形成と近藤効果の観測. 日本物理学会2022年秋季大会. 2022
  4. 磯上 慎二, ナガリンガム ラジャマニカン, 小塚 裕介, 高橋 有紀子. (111)面配向したノンコリニアMn4N単一磁性層における無磁場中電気的磁化反転と磁気異方性との相関. 第46回日本磁気学会学術講演会. 2022
  5. KOZUKA, Yusuke, ISOGAMI, Shinji, MASUDA, Keisuke, MIURA, Yoshio, DAS, Saikat, 藤岡 淳, OHKUBO, Tadakatsu, KASAI, Shinya. Surface-Driven Nonlinear Planar Hall Effect in Nominally Centrosymmetric Dirac Semimetal SrIrO3 Thin Films. 2022 MRS Spring Meeting & Exhibit. 2022
2021
  1. ダス サイカット, 杉本 聡志, クシュワハ ヴァルン クマール, 小塚 裕介, 葛西 伸哉. Robust Spin Current Generation using Ferroelectric Bi2WO6 at Room Temperature. 第82回応用物理学会秋季学術講演会. 2021
  2. 小塚 裕介, 増田 啓介, 三浦 良雄, 藤岡 淳, 磯上 慎二, ダス サイカット, 大久保 忠勝, 葛西 伸哉. 第一原理計算によるSrIrO3薄膜における非線形スピンホール効果発現機構の解明. 第82回応用物理学会秋季学術講演会. 2021
  3. DAS, Saikat, OHKUBO, Tadakatsu, KASAI, Shinya, KOZUKA, Yusuke. Deterministic influence of substrate-induced oxygen vacancy diffusion on Bi2WO6 thin film growth. APS March Meeting 2021. 2021
2020
  1. 小塚 裕介, 磯上 慎二, ダス サイカット, 藤岡 淳, 葛西 伸哉. SrIrO3薄膜における非線形電荷-スピン変換. 第81回応用物理学会秋季学術講演会. 2020
  2. DAS, Saikat, KOZUKA, Yusuke, OHKUBO, Tadakatsu, KASAI, Shinya. Bi2WO6 epitaxy-deterministic influence of oxygen vacancies. 第81回応用物理学会秋季学術講演会. 2020
  3. 小塚 裕介. イリジウム酸化物薄膜におけるスピン-電荷結合電子輸送. 物性研ワークショップ「ナノスケール物性科学の最先端と新展開」. 2020 招待講演
  4. 小塚 裕介, 磯上 慎二, 大久保 忠勝, 葛西 伸哉. SrIrO3/Co ヘテロ 界面におけるスピン軌道トルク. 第67回応用物理学会春季学術講演会. 2020
  5. KOZUKA, Yusuke. Spin-Charge Coupled Transport in Iridate Heterostructures. Quantum Materials Symposium 2020. 2020 招待講演
  6. KOZUKA, Yusuke. ZnO as a New Platform for Quantum Electronic Devices. IBS CINAP Seminar. 2020 招待講演
2019
  1. Denis Maryenko, 川村 実, Markus Kriener, Mohammad Saeed, KOZUKA, Yusuke, 川﨑 雅司. Spin-orbit coupling effect in ZnO heterostructures. International School and Symposium on Nanoscale Transport and phoTonics 2019. 2019
  2. KOZUKA, Yusuke. Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures. KAIST seminar. 2019 招待講演
  3. KOZUKA, Yusuke. Quantum Hall/superconductor hybrid in an oxide heterostructure. Oxide Superspin Workshop 2019. 2019 招待講演
  4. KOZUKA, Yusuke, ATSUSHI SAKAGUCHI, JOSEPH FALSON, ATSUSHI TSUKAZAKI, MASASHI KAWASAKI. Andreev reflection at the interface with an oxide in the quantum Hall regime. APS March Meeting. 2019
  5. Hangtian Hou, KOZUKA, Yusuke, Jun-wei Liao, Luke W. Smith, Dean Kos, Jonathan Griffiths, Joseph Falson, Atsushi Tsukazaki, Masashi Kawasaki, Christopher J Ford. Quantised conductance of one-dimensional strongly-correlated electrons in a ZnO heterostructure. APS March Meeting. 2019
  6. KOZUKA, Yusuke. Correlated topological phases at oxide interfaces. GLAM Special Seminar. 2019
2018
  1. 小塚 裕介. Controlling all-in-all-out antiferromagnetic domains in pyrochlore iridate thin films. Korean Physical Society Fall Meeting. 2018 招待講演
  2. 小塚 裕介. High-mobility electrons in ZnO heterostructures as a new platform for quantum information technology. 2nd Workshop on Functional Materials Science. 2018 招待講演
  3. 小塚 裕介. Correlated topological phases at oxide interfaces. CCES regular seminar. 2018 招待講演
  4. 小塚 裕介. Controlling the all-in-all-out magnetic domains in pyrochlore iridate thin films and heterostructures. 日本磁気学会第42回学術講演会. 2018 招待講演
  5. 小塚 裕介. Unconventional superconductivity at the interfaces of oxide and related materials. Oxide Superspin International School 2018. 2018 招待講演

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