New magnetic properties and a creation of next generation devices using Fe doped InAs/GaSb heterostructures
| Project/Area Number |
17H04922
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Le Duc Anh 東京大学, 大学院工学系研究科(工学部), 助教 (50783594)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥21,320,000 (Direct Cost: ¥16,400,000、Indirect Cost: ¥4,920,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2017: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
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| Keywords | Fe系強磁性半導体 / 室温強磁性 / スピンバルブ効果 / 近接磁気抵抗効果 / 奇関数磁気抵抗効果 / スピン三重項超伝導 / デルタドーピング / スピントランジスタ / スピントロニクス / 強磁性半導体 / 非相反伝導現象 / 量子情報デバイス / 磁気異方性 / 巨大磁気抵抗効果 / 磁気近接効果 / 量子情報 / スピンデバイス / スピントランジスター / Feドープ強磁性半導体 / 室温強磁性半導体 / 低温分子線エピタキシー / 強磁性共鳴 / 磁気トランジスタ / スピンポンピング / スピン電界効果トランジスタ / スピン注入 / 半導体ヘテロ接合 / 分子線エピタキシー |
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| Outline of Final Research Achievements |
In this research, we investigate magnetic properties and device applications of Fe-based ferromagnetic semiconductors (FMSs). We successfully grew both p-type and n-type FMS with high Curie temperature (TC), which show an unprecedented tendency of higher TC in materials with narrower band gap. We elucidated the mechanisms of the strong ferromagnetism, band structures, and magnetic anisotropy in these Fe-based FMSs, from which we proposed a new design methodology towards high-TC FMSs. Furthermore, in several Fe doped GaSb/InAs heterostructures, we realized a spin-valve effect, and completely new phenomena such as giant proximity magnetoresistance and odd-parity magnetoresistance, which is crucial for device applications. With all of these virtues, our research has significantly advanced the field of spintronics. Last but not least, we realized a spin-triplet superconductivity in (In,Fe)As, which would pave a way towards a new hybrid research field of superconducting spintronics.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究はFe系強磁性半導体（FMS）で本来のFMSの問題をすべて克服しただけでなく、多くの固定観念を覆す結果も次々と発見した。特に大事な結果は高TCのFMS材料の実現に成功し、その強磁性発現機構及び材料設計指針を色々明らかになった。また本研究で初めて観測できた新しい磁気抵抗効果はどれも新規性と応用性が高い。このように本研究が半導体磁性全般を理論上と応用上の両側面で大きく前進させたと言える。更に、強磁性体と超伝導体を融合した新しい分野にパラダイムシフトすることも期待できる。半導体に「スピン」と「超伝導」を組み込むことより、今後求められる低消費電力や新機能を持つデバイスの創製に大きく貢献できる。
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Report
(4 results)
Research Products
(106 results)
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[Presentation] SrTiO3 界面における高移動度二次元正孔ガスの実現2020
Author(s)
Shingo Kaneta, Le Duc Anh, Masahi Tokunaga, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, Shinobu Ohya
Organizer
The 10th seminar of Ferroic-Ordering and Their Manipulation Study Group
Related Report
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[Presentation] SrTiO3 界面における高移動度二次元正孔ガスの実現2020
Author(s)
Shingo Kaneta, Le Duc Anh, Masahi Tokunaga, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, Shinobu Ohya
Organizer
67th Spring Meeting of the Japan Society of Applied Physics
Related Report
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[Presentation] Fe concentration dependence of the Fe 3d electronic states in p-type ferromagnetic semiconductor (Ga1-x,Fex)Sb2020
Author(s)
Takahito Takeda, Kohsei Araki, Yuita Fujisawa, Le Duc Anh, Nguyen Thanh Tu, Tukiharu Takeda, Shin-ichi Fujimori, Atsushi Fujimori, Masaaki Tanaka, and Masaki Kobayashi
Organizer
67th Spring Meeting of the Japan Society of Applied Physics
Related Report
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[Presentation] Unveiling the electronic band structure of n-type ferromagnetic semiconductor (In,Fe)As2019
Author(s)
Masaki Kobayashi, Le Duc Anh, Jan Minar, Walayat Khan, Pham Nam Hai, Yoshihisa Harada, Thorsten Schmitt, Atsushi Fujimori, Masaharu Oshima, Masaaki Tanaka, and Vladimir N. Strocov
Organizer
40th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX19)
Related Report
Int'l Joint Research
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[Presentation] 強磁性酸化物界面における超低消費電力磁化スイッチング2019
Author(s)
Shinobu Ohya, Le Duc Anh, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka
Organizer
The 3rd Workshop of Center for Spintronics Research Network（CSRN）on New Spintronic Functional Materials and Giant Physical Response)
Related Report
Invited
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[Presentation] 高品質エピタキシャル単結晶酸化物ヘテロ界面による高効率真性スピン流電流変換2019
Author(s)
Shinobu Ohya, Daisei Araki, Le Duc Anh, Shingo Kaneta, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka
Organizer
24th Meeting on Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS-24)
Related Report
Invited
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[Presentation] Electronic structure of p-type ferromagnetic semiconductor (Ga,Fe)Sb: Valence band and impurity band2019
Author(s)
T. Takeda, M. Suzuki, L. D. Anh, Y. Nonaka, T. Schmitt, S. Yoshida, M. Sakano, K. Ishizaka, Y. Takeda, S.-I. Fujimori, M. Seki, H. Tabata, A. Fujimori, M. Tanaka, V. N. Strocov, and M. Kobayashi
Organizer
74th Spring Meeting of the Physical Society of Japan
Related Report
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[Presentation] p型強磁性半導体 (Ga,Fe)Sbのspバンドと不純物バンド2019
Author(s)
T. Takeda, M. Suzuki, L. D. Anh, Y. Nonaka, T. Schmitt, S. Yoshida, M. Sakano, K. Ishizaka, Y. Takeda, N. Fujimori, M. Seki, H. Tabata, A. Fujimori, V. N. Strocov, M. Tanaka, M. Kobayashi
Organizer
Spin-RJN Symposium
Related Report
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[Presentation] Observation of the inverse spin Hall effect in the topological crystalline insulator SnTe using spin pumping2018
Author(s)
Shinobu Ohya, Akiyori Yamamoto, Tomonari Yamaguchi, Ryo Ishikawa, Ryota Akiyama, Le Duc Anh, Shobhit Goel, Yuki K. Wakabayashi, Shinji Kuroda, and Masaaki Tanaka
Organizer
Spintronics XI, SPIE Nanoscience + Engineering
Related Report
Int'l Joint Research / Invited
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