Creation of New Spin-Functional Materials and Devices by Renaissance of Ferromagnetic Semiconductors

2022 Fiscal Year Annual Research Report

• Project/Area Number: 20H05650
• Research Institution: The University of Tokyo
• Principal Investigator: 田中 雅明 東京大学, 大学院工学系研究科(工学部), 教授 (30192636)
• Co-Investigator(Kenkyū-buntansha): 大矢 忍 東京大学, 大学院工学系研究科(工学部), 教授 (20401143) ; PHAM NAM・HAI 東京工業大学, 工学院, 准教授 (50571717) ; Le DucAnh 東京大学, 大学院工学系研究科(工学部), 准教授 (50783594)
• Project Period (FY): 2020-08-31 – 2025-03-31
• Keywords: スピン / 強磁性半導体 / ヘテロ構造 / 狭ギャップ半導体 / 電界効果磁化制御 / 低消費電力デバイス / スピントロニクス / トポロジカル物質

Outline of Annual Research Achievements

これまで実績があるMn添加強磁性半導体に加えて、従来作製することが不可能であった室温以上のキュリー温度（Tc）をもつ新しいｐ型強磁性半導体（(Ga,Fe)Sb）、ｎ型強磁性半導体（(In,Fe)Sb, (In,Fe)As)およびそれらを含むヘテロ構造・ナノ構造の分子線エピタキシー(MBE)成長に成功し、その基本物性や明らかにしてデバイス機能を示した。令和４(2022)年度の主な成果を述べる。
(1) 非磁性半導体（InAs）/強磁性半導体（(Ga0.8,Fe0.2)Sb）からなるヘテロ構造における新しい電子伝導現象（巨大な磁気抵抗効果）の発見とその電界制御に成功した。特に、奇関数を示す巨大磁気抵抗効果を発見、磁場を反転させた場合の抵抗変化は最大で27％であり、これまでの記録を１０倍以上更新する結果を得た。この結果は、時間反転対称性と空間反転対称性が同時に破れているという物質中の特異な対称性の破れによって、これまでにない大きな奇関数磁気抵抗効果という巨大応答が引き起こされたという点で大きな意味がある。
(2) 横型スピンバルブ素子における世界最高の横型スピンバルブ比とゲート変調を実現した。MBE法によりSrTiO3基板上に厚さ12 nmのLaSrMnO3層をエピタキシャル成長し、電子ビーム(EB)露光によりナノサイズの非常に短いMott絶縁体のチャネルを持つ横型スピンバルブ素子を作製することに成功した。このLaSrMnO3 / SrTiO3 / LaSrMnO3からなるデバイスでは、横型スピンバルブ構造としては世界最高値である115 %という極めて大きなMR比を得た。
(3) n型強磁性半導体InFeSb或いはInFeAs / ｐ型強磁性半導GaFeSbからなる強磁性半導体ｐ-ｎ接合を作製し、500％のMR比を示す巨大なスピン依存伝導特性を観測した。

Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

従来作製することが不可能であった室温以上のキュリー温度（Tc）をもつ新しいｐ型強磁性半導体（(Ga,Fe)Sb）、ｎ型強磁性半導体（(In,Fe)Sb、(In,Fe)As)およびそれらを含むヘテロ構造・ナノ構造の成長に成功し、その新しい物性機能を示した。特に、奇関数磁気抵抗効果など新しい巨大物性応答を観測しその機構の一端を解明した。

Strategy for Future Research Activity

当初計画外の成果として、世界最高品質の単結晶ダイヤモンド型結晶構造をもつα-Sn薄膜をIII-V族半導体InSb上にエピタキシャル成長することに成功し、トポロジカル物質としての性質を明らかにしたので、これを含めて狭ギャップ強磁性半導体と組み合わせ、さらに機能開発を行う。

Research Products

• [Int'l Joint Research] ホーチミン市師範大学(ベトナム)
  • Country Name: VIET NAM
  • Counterpart Institution: ホーチミン市師範大学
• [Journal Article] Room-temperature spin injection from a ferromagnetic semiconductor (2023)
  • Author(s): Goel Shobhit、Khang Nguyen Huynh Duy、Osada Yuki、Anh Le Duc、Hai Pham Nam、Tanaka Masaaki
  • Journal Title: Scientific Reports Volume: 13 Pages: 2181/1-9
  • DOI: 10.1038/s41598-023-29169-9
  • Peer Reviewed / Open Access
• [Journal Article] Origin of magnetically dead layers in spinel ferrites MFe2O4 grown on Al2O3: Effects of post-deposition annealing studied by XMCD (2023)
  • Author(s): Nonaka Yosuke、Wakabayashi Yuki K.、Shibata Goro、Sakamoto Shoya、Ikeda Keisuke、Chi Zhendong、Wan Yuxuan、Suzuki Masahiro、Tanaka Arata、Tanaka Masaaki、Fujimori Atsushi
  • Journal Title: Physical Review Materials Volume: 7 Pages: 044413/1-10
  • DOI: 10.1103/PhysRevMaterials.7.044413
  • Peer Reviewed / Open Access
• [Journal Article] Ferromagnetism induced by hybridization of Fe 3d orbitals with ligand InSb bands in n-type ferromagnetic semiconductor (In,Fe)Sb (2023)
  • Author(s): Okano Ryo、Hotta Tomoki、Takeda Takahito、Araki Kohsei、Takase Kengo、Anh Le Duc、Sakamoto Shoya、Takeda Yukiharu、Fujimori Atsushi、Tanaka Masaaki、Kobayashi Masaki
  • Journal Title: Physical Review B Volume: 107 Pages: 205205/1-7
  • DOI: 10.1103/PhysRevB.107.205205
  • Peer Reviewed
• [Journal Article] Scattering-dependent transport of SrRuO3 films: From Weyl fermion transport to hump-like Hall effect anomaly (2023)
  • Author(s): Kaneta-Takada Shingo、Wakabayashi Yuki K.、Krockenberger Yoshiharu、Irie Hiroshi、Ohya Shinobu、Tanaka Masaaki、Taniyasu Yoshitaka、Yamamoto Hideki
  • Journal Title: Physical Review Materials Volume: 7 Pages: 054406/1-8
  • DOI: 10.1103/PhysRevMaterials.7.054406
  • Peer Reviewed / Open Access
• [Journal Article] Giant Spin‐Valve Effect in Planar Spin Devices Using an Artificially Implemented Nanolength Mott‐Insulator Region (2023)
  • Author(s): Endo Tatsuro、Tsuruoka Shun、Tadano Yuriko、Kaneta‐Takada Shingo、Seki Yuichi、Kobayashi Masaki、Anh Le Duc、Seki Munetoshi、Tabata Hitoshi、Tanaka Masaaki、Ohya Shinobu
  • Journal Title: Advanced Materials Volume: 35 Pages: 2300110/1-8
  • DOI: 10.1002/adma.202300110
  • Peer Reviewed / Open Access
• [Journal Article] Electric Field Control of Spin-Orbit Torque Magnetization Switching in a Spin-Orbit Ferromagnet Single Layer (2023)
  • Author(s): Jiang Miao、Asahara Hirokatsu、Ohya Shinobu、Tanaka Masaaki
  • Journal Title: Advanced Science Volume: 10 Pages: 2301540/1-7
  • DOI: 10.1002/advs.202301540
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Control of magnetic anisotropy by epitaxial strain in n-type ferromagnetic semiconductor (In,Fe)Sb (2023)
  • Author(s): Pillai Akhil、Goel Shobhit、Anh Le Duc、Tanaka Masaaki
  • Journal Title: Physical Review B Volume: 108 Pages: 014421/1-10
  • DOI: 10.1103/PhysRevB.108.014421
  • Peer Reviewed
• [Journal Article] Intervalence charge transfer and charge transport in the spinel ferrite ferromagnetic semiconductor Ru-doped CoFe2O4 (2022)
  • Author(s): Kobayashi Masaki、Seki Munetoshi、Suzuki Masahiro、Okano Ryo、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Fujimori Atsushi、Tanaka Masaaki、Tabata Hitoshi
  • Journal Title: Physical Review B Volume: 105 Pages: 205103/1-6
  • DOI: 10.1103/PhysRevB.105.205103
  • Peer Reviewed
• [Journal Article] Development of magnetism in Fe-doped magnetic semiconductors: Resonant photoemission and x-ray magnetic circular dichroism studies of (Ga,Fe)As (2022)
  • Author(s): Takeda Takahito、Sakamoto Shoya、Anh Le Duc、Takeda Yukiharu、Fujimori Shin-ichi、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Fujimori Atsushi、Tanaka Masaaki、Kobayashi Masaki
  • Journal Title: Physical Review B Volume: 105 Pages: 195155/1-10
  • DOI: 10.1103/PhysRevB.105.195155
  • Peer Reviewed
• [Journal Article] Rhombic Fermi surfaces in a ferromagnetic MnGa thin film with perpendicular magnetic anisotropy (2022)
  • Author(s): Kobayashi M.、Khang N. H. D.、Takeda T.、Araki K.、Okano R.、Suzuki M.、Kuroda K.、Yaji K.、Sugawara K.、Souma S.、Nakayama K.、Yamauchi K.、Kitamura M.、Horiba K.、Fujimori A.、Sato T.、Shin S.、Tanaka M.、Hai P. N.
  • Journal Title: Physical Review Materials Volume: 6 Pages: 074403/1-7
  • DOI: 10.1103/PhysRevMaterials.6.074403
  • Peer Reviewed / Open Access
• [Journal Article] Gate-controlled proximity magnetoresistance in In1-xGaxAs/(Ga,Fe)Sb bilayer heterostructures (2022)
  • Author(s): Takiguchi Kosuke、Okamura Kyosuke、Anh Le Duc、Tanaka Masaaki
  • Journal Title: Physical Review B Volume: 105 Pages: 235202/1-7
  • DOI: 10.1103/PhysRevB.105.235202
  • Peer Reviewed
• [Journal Article] Giant spin-to-charge conversion at an all-epitaxial single-crystal-oxide Rashba interface with a strongly correlated metal interlayer (2022)
  • Author(s): Kaneta-Takada Shingo、Kitamura Miho、Arai Shoma、Arai Takuma、Okano Ryo、Anh Le Duc、Endo Tatsuro、Horiba Koji、Kumigashira Hiroshi、Kobayashi Masaki、Seki Munetoshi、Tabata Hitoshi、Tanaka Masaaki、Ohya Shinobu
  • Journal Title: Nature Communications Volume: 13 Pages: 5631/1-8
  • DOI: 10.1038/s41467-022-33350-5
  • Peer Reviewed / Open Access
• [Journal Article] High-mobility two-dimensional carriers from surface Fermi arcs in magnetic Weyl semimetal films (2022)
  • Author(s): Kaneta-Takada Shingo、Wakabayashi Yuki K.、Krockenberger Yoshiharu、Nomura Toshihiro、Kohama Yoshimitsu、Nikolaev Sergey A.、Das Hena、Irie Hiroshi、Takiguchi Kosuke、Ohya Shinobu、Tanaka Masaaki、Taniyasu Yoshitaka、Yamamoto Hideki
  • Journal Title: npj Quantum Materials Volume: 7 Pages: 102/1-12
  • DOI: 10.1038/s41535-022-00511-0
  • Peer Reviewed / Open Access
• [Journal Article] Giant gate-controlled odd-parity magnetoresistance in one-dimensional channels with a magnetic proximity effect (2022)
  • Author(s): Takiguchi Kosuke、Anh Le Duc、Chiba Takahiro、Shiratani Harunori、Fukuzawa Ryota、Takahashi Takuji、Tanaka Masaaki
  • Journal Title: Nature Communications Volume: 13 Pages: 6538/1-7
  • DOI: 10.1038/s41467-022-34177-w
  • Peer Reviewed / Open Access
• [Journal Article] Electron Spin Transport in a Metal-Oxide-Semiconductor Si Two-Dimensional Inversion Channel: Effect of Hydrogen Annealing on Spin-Scattering Mechanism and Spin Lifetime (2022)
  • Author(s): Sato Shoichi、Tanaka Masaaki、Nakane Ryosho
  • Journal Title: Physical Review Applied Volume: 18 Pages: 064071/1-11
  • DOI: 10.1103/PhysRevApplied.18.064071
  • Peer Reviewed / Open Access
• [Presentation] Giant spin-charge conversion in an all-epitaxial single-crystal-oxide Rashba LaTiO3+δ/SrTiO3 heterostructure (2023)
  • Author(s): S. Kaneta-Takada, M. Kitamura, S. Arai, T. Arai, R. Okano, L.D. Anh, T. Endo, K. Horiba, H. Kumigashira, M. Kobayashi, M. Seki, H. Tabata, M. Tanaka, and S. Ohya
  • Organizer: APS March Meeting 2023
  • Int'l Joint Research
• [Presentation] Nanofabrication of Sn-based superconductor / topological Dirac semimetal heterostructures (2023)
  • Author(s): Keita Ishihara, Le Duc Anh, Tomoki Hotta, Masaaki Tanaka
  • Organizer: APS March Meeting 2023
  • Int'l Joint Research
• [Presentation] A new class of ferromagnetic semiconductors and quantum heterostructures (2023)
  • Author(s): Le Duc Anh, Kosuke Takiguchi, Takahiro Chiba, and Masaaki Tanaka
  • Organizer: IEEE International Magnetics Conference (Intermag 2023)
  • Int'l Joint Research / Invited
• [Presentation] A new class of Fe-doped III-V ferromagnetic semiconductors with high Curie temperature and their quantum heterostructures (2023)
  • Author(s): Masaaki Tanaka
  • Organizer: Compound Semiconductor Week 2023 (CSW 2023)
  • Int'l Joint Research / Invited
• [Presentation] Epitaxial growth and topological transport properties in Sn-based quantum heterostructures (2023)
  • Author(s): Le Duc Anh, Keita Ishihara, Tomoki Hotta, Takahiro Chiba, Yohei Kota, and Masaaki Tanaka
  • Organizer: Superstripes 2023 Quantum Complex Matter
  • Int'l Joint Research / Invited
• [Presentation] Giant spin-to-charge conversion in two-dimensional states at high-quality all-epitaxial single-crystal-oxide interfaces/surfaces (2023)
  • Author(s): Shinobu Ohya
  • Organizer: 25th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-25) and 21st International Conference on Modulated Semiconductor Structures (MSS-21)
  • Int'l Joint Research / Invited
• [Presentation] New magnetotransport phenomena in quantum heterostructures containing an Fe-doped ferromagnetic semiconductor (2023)
  • Author(s): Le Duc Anh, Kosuke Takiguchi, Harunori Shiratani, Ryo Morikawa1, Takahiro Chiba, and Masaaki Tanaka
  • Organizer: 25th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-25) and 21st International Conference on Modulated Semiconductor Structures (MSS-21)
  • Int'l Joint Research / Invited
• [Presentation] Large nonreciprocal superconductivity in β-Sn nanowires embedded in topological Dirac semimetal α-Sn thin films (2023)
  • Author(s): Keita Ishihara, Le Duc Anh Tomoki Hotta, Kohdai Inagaki, Masaki Kobayashi, and Masaaki Tanaka
  • Organizer: 25th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-25) and 21st International Conference on Modulated Semiconductor Structures (MSS-21)
  • Int'l Joint Research
• [Presentation] Overview of Spintronics Research Network of Japan (Spin-RNJ) and Centers for Spintronics Research Network (CSRN) (2023)
  • Author(s): Masaaki Tanaka
  • Organizer: EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)
  • Int'l Joint Research
• [Presentation] A new class of Fe-doped III-V ferromagnetic semiconductors with high Curie temperature and their quantum heterostructures (2023)
  • Author(s): Masaaki Tanaka, Le Duc Anh, Nguyen Thanh Tu, Shobhit Goel, Karumuri Sriharsha, Kosuke Takiguchi, Pham Nam Hai
  • Organizer: EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)
  • Int'l Joint Research / Invited
• [Presentation] Developments of novel spintronics functionalities using oxide heterostructures (2023)
  • Author(s): Shinobu Ohya, Tatsuro Endo, Shun Tsuruoka, Yuriko Tadano, Shingo Kaneta-Takada, Yuichi Seki, Masaki Kobayashi, Le Duc Anh, Munetoshi Seki, Hitoshi Tabata, and Masaaki Tanaka
  • Organizer: EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)
  • Int'l Joint Research / Invited
• [Presentation] New topological transport phenomena in Sn-based quantum heterostructures (2023)
  • Author(s): Le Duc Anh, Kengo Takase, Kosuke Takiguchi, Keita Ishihara, and Masaaki Tanaka
  • Organizer: EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)
  • Int'l Joint Research / Invited
• [Presentation] Device physics of Si-based spin metal-oxide-semiconductor field-effect transistors (2023)
  • Author(s): Ryosho Nakane, Shoichi Sato, and Masaaki Tanaka
  • Organizer: EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)
  • Int'l Joint Research / Invited
• [Presentation] Room-temperature spintronics using ferromagnetic semiconductor and topological insulator (2023)
  • Author(s): Pham Nam Hai, Nguyen. H. D. Khang, Nguyen Thanh Tu, Le Duc Anh and Masaaki Tanaka
  • Organizer: EU-Japan Workshop on Spintronics and Quantum Transformation (Spin-QX 2023)
  • Int'l Joint Research / Invited
• [Presentation] New Magnetotransport Phenomena in Non-magnetic/Ferromagnetic Semiconductor Quantum Heterostructures (2023)
  • Author(s): Le Duc Anh, Kosuke Takiguchi, Harunori Shiratani, Ryo Morikawa, Takahiro Chiba, and Masaaki Tanaka
  • Organizer: 6th International Conference of Asian Union of Magnetics Societies (IcAUMS 2023)
  • Int'l Joint Research / Invited
• [Presentation] Ferromagnetic semiconductor (Ga,Fe)Sb with very high Curie temperature (530 K) grown on vicinal GaAs(001) substrates (2023)
  • Author(s): Kenta Takabayashi, Masaaki Tanaka, and Pham Nam Hai
  • Organizer: 55th Solid State Devices and Materials (SSDM)
  • Int'l Joint Research
• [Presentation] A new class of Fe-doped III-V ferromagnetic semiconductors with high Curie temperature and their quantum heterostructures (2023)
  • Author(s): Masaaki Tanaka, Kosuke Takiguchi, and Le Duc Anh
  • Organizer: International Workshop on Spintronics (Spin Asia 2023)
  • Int'l Joint Research / Invited
• [Presentation] Giant spin-to-charge conversion in a (La,Sr)MnO3/LaTiO3+δ/SrTiO3 single-crystalline epitaxial heterostructure (2023)
  • Author(s): Shingo Kaneta-Takada, Miho Kitamura, Shoma Arai, Takuma Arai, Ryo Okano, Le Duc Anh, Tatsuro Endo, Koji Horiba, Hiroshi Kumigashira, Masaki Kobayashi, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 強的秩序とその操作に関わる 第16回 講演会
• [Presentation] シリコンベース・スピン電界効果型トランジスタ(Spin MOSFET)における電子スピン輸送 (Spin transport in Si-based spin metal-oxide-semiconductor field-effect transistors) (2023)
  • Author(s): Shoichi Sato, Masaaki Tanaka1, and Ryosho Nakane
  • Organizer: 第14回東京大学低温科学研究センター研究交流会
• [Presentation] Nanofabrication of Sn-based superconductor / topological Dirac semimetal planar heterostructures (2023)
  • Author(s): Keita Ishihara, Le Duc Anh, Tomoki Hotta, Kohdai Inagaki, Masaki Kobayashi, and Masaaki Tanaka
  • Organizer: 第14回東京大学低温科学研究センター研究交流会
• [Presentation] Change of the band structure in a freestanding La0.67Sr0.33MnO3 thin film (2023)
  • Author(s): Takuma Arai, Shingo Kaneta-Takada, Le Duc Anh, Masaki Kobayashi, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 第14回東京大学低温科学研究センター研究交流会
• [Presentation] Gate modulation of current in the metal-insulator transition region of La0.67Sr0.33MnO3 (2023)
  • Author(s): Tatsuro Endo, Shun Tsuruoka, Yuriko Tadano, Shingo Kaneta-Takada, Le Duc Anh, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 第14回東京大学低温科学研究センター研究交流会
• [Presentation] Magnetic-field-controllable resistive-switching and spin-valve-like behavior in an Fe/MgO/Ge-based two-terminal device (2023)
  • Author(s): Masaya Kaneda, Shun Tsuruoka, Hiroshi Katayama-Yoshida, Tatsuro Endo, Yuriko Tadano, Masaaki Tanaka, and and Shinobu Ohya
  • Organizer: 第14回東京大学低温科学研究センター研究交流会
• [Presentation] Magnetic-field-controllable resistive-switching and spin-valve-like behavior in an Fe/MgO/Ge-based two-terminal device (2023)
  • Author(s): Masaya Kaneda, Shun Tsuruoka, Hiroshi Katayama-Yoshida, Tatsuro Endo, Yuriko Tadano, Masaaki Tanaka, and and Shinobu Ohya
  • Organizer: 2023年第70回応用物理学会春季学術講演会
• [Presentation] Change of the band structure in a freestanding La0.67Sr0.33MnO3 thin film (2023)
  • Author(s): Takuma Arai, Shingo Kaneta-Takada, Le Duc Anh, Masaki Kobayashi, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 2023年第70回応用物理学会春季学術講演会
• [Presentation] Gate modulation of current in the metal-insulator transition region of La0.67Sr0.33MnO3 (2023)
  • Author(s): Tatsuro Endo, Shun Tsuruoka, Yuriko Tadano, Shingo Kaneta-Takada, Le Duc Anh, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 2023年第70回応用物理学会春季学術講演会
• [Presentation] Spin polarization and magnetoresistance in a back-gated spin MOSFET structure with Fe/Mg/MgO/SiOx/n+-Si junctions (2023)
  • Author(s): Shoichi Sato, Masaaki Tanaka1, and Ryosho Nakane
  • Organizer: 2023年第70回応用物理学会春季学術講演会
• [Presentation] Nanofabrication of Sn-based superconductor / topological Dirac semimetal planar heterostructures (2023)
  • Author(s): Keita Ishihara, Le Duc Anh, Tomoki Hotta, Kohdai Inagaki, Masaki Kobayashi, and Masaaki Tanaka
  • Organizer: 2023年第70回応用物理学会春季学術講演会
• [Presentation] Giant superconducting diode effect in β-Sn nanowires embedded in topological Dirac semimetal α-Sn thin films (2023)
  • Author(s): Le Duc Anh, Keita Ishihara, Tomoki Hotta1 and Masaaki Tanaka
  • Organizer: 2023年第70回応用物理学会春季学術講演会
• [Presentation] スピントロニクス学術研究基盤と連携ネットワーク (Spin-RNJ)の活動と今後の展望 (2023)
  • Author(s): 田中雅明
  • Organizer: スピントロニクス学術研究基盤と連携ネットワーク（Spin-RNJ）」シンポジウム
• [Presentation] スズ(Sn)ベース量子ヘテロ構造のエピタキシャル成長とトポロジカル輸送特性 (2023)
  • Author(s): レデゥックアイン、高瀬健吾、石原奎太、堀田智貴、千葉貴裕、小田洋平、田中雅明
  • Organizer: スピントロニクス学術研究基盤と連携ネットワーク（Spin-RNJ）」シンポジウム
  • Invited
• [Presentation] 強相関金属を用いた単結晶酸化物ラシュバ界面における巨大スピン流-電流変換 (2023)
  • Author(s): 金田真悟, 北村未歩, 荒井勝真, 新居拓眞, 岡野諒, Le Duc Anh, 遠藤達朗,堀場弘司, 組頭広志, 小林正起, 関宗俊, 田畑仁, 田中雅明, 大矢忍
  • Organizer: スピントロニクス学術研究基盤と連携ネットワーク（Spin-RNJ）」シンポジウム
• [Presentation] Nanoscale metal-insulator transition of La0.67Sr0.33MnO3 and its application to two-terminal spin-valve devices and spin MOSFET (2023)
  • Author(s): Tatsuro Endo, Shun Tsuruoka, Yuriko Tadano, Shingo Kaneta-Takada, Le Duc Anh, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: スピントロニクス学術研究基盤と連携ネットワーク（Spin-RNJ）」シンポジウム
• [Presentation] トポロジカルディラック半金属α-Sn / 強磁性半導体(In,Fe)Sbヘテロ構造のエピタキシャル成長と量子振動の観測 (2023)
  • Author(s): 堀田智貴、レドゥックアイン、田中雅明
  • Organizer: スピントロニクス学術研究基盤と連携ネットワーク（Spin-RNJ）」シンポジウム
• [Presentation] Snベース超伝導体/トポロジカルディラック半金属横型ヘテロ接合の微細加工 (2023)
  • Author(s): 石原奎太、レドゥックアイン、堀田智貴、稲垣洸大、小林正起、田中雅明
  • Organizer: スピントロニクス学術研究基盤と連携ネットワーク（Spin-RNJ）」シンポジウム
• [Presentation] 強相関強磁性遷移金属酸化物SrRuO3薄膜における軌道に依存したRu 4d-配位子混成状態密度の観測 (2023)
  • Author(s): 関祐一, 若林勇希, 武田崇仁, 稲垣洸大, 藤森伸一, 竹田幸治, 谷保芳孝, 山本秀樹, Yoshiharu Krockenberger, 藤森淳, 田中雅明, 小林正起
  • Organizer: 日本物理学会第78回年次大会
• [Presentation] 集束イオンビーム照射によるディラック半金属α-Snの超伝導体 β-Snへの同素体転移 (2023)
  • Author(s): 稲垣 洸大, 石原 奎太, 堀田 智貴, 関 祐一, 武田 崇仁, 石田 達弘, 大槻 太殻, 川崎 郁人, 藤森 伸一, 田中 雅明, Le Duc Anh, 小林 正起
  • Organizer: 日本物理学会第78回年次大会
• [Presentation] New superconducting phenomena in Sn-based quantum structures (2023)
  • Author(s): Le Duc Anh, Keita Ishihara1, Tomoki Hotta, Daiki Nishigaki, and Masaaki Tanaka
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
  • Invited
• [Presentation] Magnetic-field and current-direction dependence of the superconducting diode effect in superconductor Sn wires embedded in a Dirac semimetal thin film (2023)
  • Author(s): Keita Ishihara, Le Duc Anh, Tomoki Hotta, and Masaaki Tanaka
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Influence of the Ru composition change on the spin-to-charge conversion in SrRu1-xO3 films (2023)
  • Author(s): Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshitaka Taniyasu, Hideki Yamamoto, Yoshiharu Krockenberger, Hikari Shinya, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Scattering-dependent transport of SrRuO3 films: From Weyl fermion transport to hump-like Hall effect anomaly (2023)
  • Author(s): Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger, Hiroshi Irie1, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, and Hideki Yamamoto
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Superconductivity in an α-Sn thin film (2023)
  • Author(s): Tomoki Hotta, Le Duc Anh, and Masaaki Tanaka
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Field-free spin-orbit torque magnetization switching in a perpendicularly magnetized (Ga,Mn)As single layer (2023)
  • Author(s): Xinyuan Yang, Chenda Wang, Miao Jiang, Shinobu Ohya, and Masaaki Tanaka
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Single-layer spin-orbit torque magnetization switching in high-quality ferromagnetic Weyl semimetal SrRuO3 (2023)
  • Author(s): Hiroto Horiuchi, Yuki K. Wakabayashi, Shingo Kaneta-Takada, Yoshitaka Taniyasu, Hideki Yamamoto, Yoshiharu Krockenberger, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Observation of high-mobility quantum transport and topological band structure of α-Sn / Fe heterostructures (2023)
  • Author(s): Soichiro Fukuoka, Tomoki Hotta, Le Duc Anh, Takahiro Chiba, Yohei Kota, and Masaaki Tanaka
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] 強相関強磁性遷移金属酸化物SrRuO3における軌道依存Ru 4d-O 2p混成状態密度 (2023)
  • Author(s): 関祐一, 若林勇希, 武田崇仁, 稲垣洸大, 藤森伸一, 竹田幸治, 谷保芳孝, 山本秀樹, Yoshiharu Krockenberger, 藤森淳, 田中雅明, 小林 正起
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] 集束イオンビーム照射によるディラック半金属α-Snの超伝導体β-Snへの同素体転移 (2023)
  • Author(s): 稲垣洸大, 石原奎太, 堀田智貴, 関祐一, 武田崇仁, 石田達拡, 大槻太毅, 川崎郁斗, 藤森伸一, 田中雅明, Le Duc Anh, 小林正起
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Epitaxial growth and characterization of superconductor Al / ferromagnetic semiconductor (In,Fe)As heterostructures on InP substrates (2023)
  • Author(s): Hirotaka Hara, Keita Ishihara, Le Duc Anh, and Masaaki Tanaka
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Very high Curie temperature (530 K) in ferromagnetic semiconductor (Ga,Fe)Sb grown on vicinal GaAs(001) substrates (2023)
  • Author(s): Kenta Takabayashi, Masaaki Tanaka, and Pham Nam Hai
  • Organizer: 2023年"第84回応用物理学会秋季学術講演会
• [Presentation] Ru組成の異なるSrRuO3およびSrRu0.7O3薄膜におけるスピン流-電流変換効率の比較 (Comparison of the spin-to-charge conversion efficiencies between SrRuO3 and SrRu0.7O3 thin films) (2023)
  • Author(s): 金田真悟、若林勇希、新屋ひかり、谷保芳孝、山本秀樹、ヨシハルクロッケンバーガー、田中雅明、大矢忍
  • Organizer: 強的秩序とその操作に関わる 第17回 夏の学校 ＆ 学術変革B 超軌道分裂による新奇巨大界面応答 キックオフシンポジウム
• [Presentation] MgOベースの抵抗スイッチ効果デバイスにみられる巨大なスピンバルブライク動作 (Giant spin-valve-like behaver in a MgO based resistive switching device) (2023)
  • Author(s): 金田昌也、鶴岡駿、遠藤達朗、但野由梨子、武田崇仁、福島鉄也、新屋ひかり、真砂啓、田中雅明、吉田博、大矢忍
  • Organizer: 強的秩序とその操作に関わる 第17回 夏の学校 ＆ 学術変革B 超軌道分裂による新奇巨大界面応答 キックオフシンポジウム
• [Presentation] Renaissance of ferromagnetic semiconductors and their applications to spintronicsand topological electronics (2022)
  • Author(s): Masaaki Tanaka, Le Duc Anh, Tomoki Hotta, Keita Ishihara, Kosuke Takiguchi, and Pham Nam Hai
  • Organizer: Symposium on Topotronics for the Metaverse
  • Int'l Joint Research / Invited
• [Presentation] Topological Dirac Semimetal α-Sn: A new platform for topological quantum physics and devices (2022)
  • Author(s): Le Duc Anh, Kengo Takase, Tomoki Hotta, Kosuke Takiguchi, and Masaaki Tanaka
  • Organizer: Symposium on Topotronics for the Metaverse
  • Int'l Joint Research / Invited
• [Presentation] Field-free spin-orbit torque magnetization switching in a perpendicularly magnetized ferromagnetic semiconductor single layer (2022)
  • Author(s): Miao Jiang, Chenda Wang, Shinobu Ohya, and Masaaki Tanaka
  • Organizer: 15th Asia Pacific Physics Conference (APPC15)
  • Int'l Joint Research
• [Presentation] Elemental Topological Dirac Semimetal α-Sn with High Quantum Mobility (2022)
  • Author(s): Le Duc Anh, Kengo Takase, Tomoki Hotta, Takahiro Chiba, Yohei Kota, Kosuke Takiguchi, Subaru Ubukata, and Masaaki Tanaka
  • Organizer: 22nd International Conference on Molecular Beam Epitaxy (ICMBE 2022)
  • Int'l Joint Research / Invited
• [Presentation] Fe-doped ferromagnetic semiconductors: New perspectives for spintronics and topological quantum electronics (2022)
  • Author(s): Le Duc Anh
  • Organizer: 22nd International Conference on Molecular Beam Epitaxy (ICMBE 2022)
  • Int'l Joint Research / Invited
• [Presentation] Giant Spin-charge Conversion in an All-epitaxial Single-crystal-oxide Rashba LaTiO3+δ/SrTiO3 Heterostructure (2022)
  • Author(s): S. Kaneta-Takada, M. Kitamura, S. Arai, T. Arai, R. Okano, L. D. Anh, T. Endo, K. Horiba, H. Kumigashira, M. Kobayashi, M. Seki, H. Tabata, M. Tanaka, and S. Ohya
  • Organizer: 22nd International Conference on Molecular Beam Epitaxy (ICMBE 2022)
  • Int'l Joint Research
• [Presentation] Growth of Topological Dirac Semimetal α-Sn / Ferromagnetic Semiconductor (In,Fe)Sb Heterostructures and Observation of Quantum Oscillations (2022)
  • Author(s): T. Hotta, L. D. Anh, and M. Tanaka
  • Organizer: 22nd International Conference on Molecular Beam Epitaxy (ICMBE 2022)
  • Int'l Joint Research
• [Presentation] Structure and magnetic properties of Fe-As films grown on GaAs (111)B substrates (2022)
  • Author(s): Seiji Aota, Le Duc Anh, and Masaaki Tanaka
  • Organizer: 22nd International Conference on Molecular Beam Epitaxy (ICMBE 2022)
  • Int'l Joint Research
• [Presentation] Spin-split Fermi surface of InAs/(Ga,Fe)Sb nonmagnetic/ferromagnetic bilayer semiconductor heterostructures (2022)
  • Author(s): H. Shiratani, K. Takiguchi, L. D. Anh, and M. Tanaka
  • Organizer: 22nd International Conference on Molecular Beam Epitaxy (ICMBE 2022)
  • Int'l Joint Research
• [Presentation] Magnetic anisotropy of n-type ferromagnetic semiconductor (In,Fe)Sb studied by ferromagnetic resonance: Control by the epitaxial strain (2022)
  • Author(s): Akhil Pillai, Shobhit Goel, Le Duc Anh, and Masaaki Tanaka
  • Organizer: 2022 International Conference on Solid State Devices and Materials (SSDM2022)
  • Int'l Joint Research
• [Presentation] Generation of spin-polarized electrons in n+-Si by spin injection through a ferromagnetic tunnel junction: Role of the band diagram (2022)
  • Author(s): Baisen Yu, Shoichi Sato, Masaaki Tanaka, and Ryosho Nakane
  • Organizer: 2022 International Conference on Solid State Devices and Materials (SSDM2022)
  • Int'l Joint Research
• [Presentation] Effect of Bi doping on the magnetic properties of the narrow-gap ferromagnetic semiconductor (In,Fe)Sb (2022)
  • Author(s): Yota Endo, Masaaki Tanaka, and Pham Nam Hai
  • Organizer: 2022 International Conference on Solid State Devices and Materials (SSDM2022)
  • Int'l Joint Research
• [Presentation] Giant voltage-controllable magnetoresistance switching in Ge short-channel devices with epitaxial ultra-thin Fe electrodes (2022)
  • Author(s): Shun Tsuruoka, Yuriko Tadano, Le Duc Anh, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022)
  • Int'l Joint Research
• [Presentation] Giant spin-valve effect in oxide-based lateral nano-scale channel devices (2022)
  • Author(s): Tatsuro Endo, Shun Tsuruoka, Shingo Kaneta-Takada, Le Duc Anh1, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022)
  • Int'l Joint Research / Invited
• [Presentation] マンガン酸化物極薄膜ヘテロ構造における金属絶縁体転移に伴う磁気異方性の変化 (2022)
  • Author(s): 小林正起, L. D. Anh, 鈴木雅弘, 金田真悟, 竹田幸治, 藤森伸一, 芝田悟朗, 田中新, 田中雅明, 大矢忍, 藤森淳
  • Organizer: 2022年日本物理学会秋季大会
• [Presentation] 半導体スピントロニクス材料とデバイス研究の新展開 (2022)
  • Author(s): 田中雅明
  • Organizer: 2022年第83回応用物理学会秋季学術講演会、シンポジウム「スピントロニクス研究のトレンドと今後の展望 ～スピントロニクス研究会20周年記念シンポジウム～」
  • Invited
• [Presentation] マンガン酸化物極薄膜ヘテロ構造における金属絶縁体転移に伴う磁気異方性の変化 (2022)
  • Author(s): 小林正起，L.D. Anh, 鈴木雅弘, 金田真悟, 竹田幸治, 藤森伸一, 芝田悟朗, 田中新,田中雅明, 大矢忍, 藤森淳
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] III-V族化合物半導体InSb極薄膜における価電子帯の低次元化 (2022)
  • Author(s): 武田 崇仁, 高瀬 健吾, V. N. Strocov, 田中 雅明, 小林 正起
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] 低接合抵抗を持つFe/Mg/SiN/n+-Si(001)磁性トンネル接合の作製とSiへのスピン注入 (2022)
  • Author(s): 赤木巌，佐藤彰一，田中雅明，中根了昌
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] Structure and magnetic properties of Fe-As films grown on GaAs (111)B substrates (2022)
  • Author(s): Seiji Aota, Le Duc Anh, and Masaaki Tanaka
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] Epitaxial growth and characterization of superconductor Al/Fe-doped III-V ferromagnetic semiconductor hybrid structures on GaAs substrates (2022)
  • Author(s): Yooho Choi, Keita Ishihara, Le Duc Anh, and Masaaki Tanaka
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] Giant spin-valve effect in oxide-based lateral nano-scale channel devices (2022)
  • Author(s): Tatsuro Endo, Shun Tsuruoka, Shingo Kaneta-Takada, Le Duc Anh, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] Giant voltage-controllable magnetoresistance switching in Ge short-channel devices with epitaxial ultra-thin Fe electrodes (2022)
  • Author(s): Shun Tsuruoka, Yuriko Tadano, Le Duc Anh, Masaaki Tanaka, and Shinobu Ohya
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] Effect of Bi doping on the magnetic properties of (In,Fe)Sb ferromagnetic semiconductor (2022)
  • Author(s): Yota Endo, Masaaki Tanaka, Pham Nam Hai
  • Organizer: 2022年第83回応用物理学会秋季学術講演会
• [Presentation] スピントロニクスと量子科学技術の現状と展望 (2022)
  • Author(s): 田中雅明
  • Organizer: ナノ量子機構・dlab・スピントロニクスセンター合同シンポジウム「量子技術と半導体が拓く未来社会」
  • Invited
• [Remarks] 田中・大矢・中根・アイン研究室
  • URL: http://www.cryst.t.u-tokyo.ac.jp/
• [Remarks] スピントロニクス学術連携研究教育センター (CSRN)
  • URL: http://www.csrn.t.u-tokyo.ac.jp/
• [Remarks] スピントロニクス学術研究基盤と連携ネットワーク拠点 (Spin-RNJ)
  • URL: http://www.csrn.t.u-tokyo.ac.jp/outline_en/
• [Patent(Industrial Property Rights)] 回路素子およびその製造方法 (2023)
  • Inventor(s): レデゥックアイン、石原奎太、田中雅明
  • Industrial Property Rights Holder: レデゥックアイン、石原奎太、田中雅明
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 特願2023-001989