Novel spintronic devices using atomically-thin superconducting films
| Project/Area Number |
16H05964
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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 |
Nanostructural physics
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥26,130,000 (Direct Cost: ¥20,100,000、Indirect Cost: ¥6,030,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2016: ¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
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| Keywords | スピントロニクス / メゾスコピック系 / 超伝導体 / 超薄膜 / 超伝導材料・素子 / スピンエレクトロニクス / 低温物性 |
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| Outline of Final Research Achievements |
In this research project, we aimed to develop novel spintronic devices using atomically-thin superconducting films. We fabricated atomically-thin NbSe2 wires and included them into spin transport devices. A clear inverse spin Hall effect was detected above the superconducting transition temperature of NbSe2 nanowire. We also fabricated high-temperature superconductor Bi2Sr2CaCu2O8+x thin film devices, in order to extend the variety of superconducting materials which can be mounted on spintronic devices. In addition, we irradiated a surface acoustic wave with the wavelength of about 1 micrometer to an atomically-thin NbSe2 device on the LiNbO3 substrate and found a negative resistance within the superconducting gap, which was not measured for conventional superconductors. The above results are a big step toward the realization of the future atomic layer spintronic devices.
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| Academic Significance and Societal Importance of the Research Achievements |
スピン流電流変換を用いたスピントロニクスデバイスへの応用という観点では、単純な金属を用いるだけでは限界があり、現在、トポロジカル絶縁体、ワイル半金属、超伝導体などを用いた研究が進展している。本研究課題で用いた原子層超伝導体を利用することができれば、電界による超伝導転移温度の制御や大きなスピン流準粒子流変換効率を用いた磁気センサなどへの応用も期待できる。また今回新たに発見した負の抵抗は、ゼロバイアスで観測されており、半導体中の負性抵抗とは異なる新しい現象である。超伝導体特有の負性抵抗を利用した発振回路や、超伝導量子ビットと組み合わせた量子演算への応用など、非常に独創的なデバイス応用が期待できる。
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Report
(5 results)
Research Products
(145 results)
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[Journal Article] Spin transport measurements in metallic Bi/Ni nanowires2019
Author(s)
Masashi Tokuda, Natsuki Kabeya, Komei Iwashita, Hiroki Taniguchi, Tomonori Arakawa, Di Yue, Xinxin Gong, Xiaofeng Jin, Kensuke Kobayashi, and Yasuhiro Niimi
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Journal Title
Applied Physics Express
Volume: 印刷中
Issue: 5
Pages: 053005-053005
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] カイラル磁性体CrNb3S6薄膜のスピン輸送測定2019
Author(s)
川原遼馬, 谷口祐紀, 河上司, Y. A. Alaoui, 荒川智紀, 乾皓人, 島本雄介, 高阪勇輔, 戸川欣彦, 小林研介, 新見康洋
Organizer
日本物理学会2019年秋季大会
Related Report
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[Presentation] カイラル磁性体CrNb3S6薄膜における磁気輸送測定2019
Author(s)
川原遼馬, 谷口祐紀, 河上司, Y. A. Alaoui, 荒川智紀, 乾皓人, 島本雄介, 高阪勇輔, 戸川欣彦, 新見康洋, 小林研介
Organizer
日本物理学会第74回年次大会
Related Report
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[Presentation] Fabrication and electrical measurements of CrNb3S6 thin films2018
Author(s)
R. Kawahara, H. Taniguchi, T. Kawakami, Y. A. Alaoui, T. Arakawa, A. Inui, Y. Shimamoto, Y. Kosaka, Y. Togawa, Y. Niimi, and K. Kobayashi
Organizer
International Symposium on Chiral Magnetism (chi-mag 2018)
Related Report
Int'l Joint Research
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[Presentation] カイラル磁性体CrNb3S6薄膜における磁気抵抗測定2018
Author(s)
川原遼馬, 谷口祐紀, 河上司, Y. A. Alaoui, 荒川智紀, 乾皓人, 島本雄介, 高阪勇輔, 戸川欣彦, 新見康洋, 小林研介
Organizer
日本物理学会2018年秋季大会
Related Report
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[Presentation] Spin transport in superconducting Bi/Ni bilayers2016
Author(s)
N. Kabeya, M. Maeda, T. Kawamura, H. Taniguchi, T. Arakawa, Y. Niimi, K. Kobayashi, X.-X. Gong, D. Yue, and X.-F. Jin
Organizer
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS9)
Place of Presentation
神戸
Year and Date
2016-08-08
Related Report
Int'l Joint Research
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