Quantum spin transport in Rashba systems
| Project/Area Number |
15H06133
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Ideue Toshiya 東京大学, 大学院工学系研究科(工学部), 助教 (90757014)
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| Project Period (FY) |
2015-08-28 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 非相反電荷輸送現象 / 空間反転対称性の破れ / スピン軌道相互作用 / 極性 / ラシュバ系 / カイラリティー / スピントロニクス / スピン流 |
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| Outline of Final Research Achievements |
In this research, we have studied the nonreciprocal electric transport in polar and chiral materials, which is one of the manifestations of the lattice symmetry breaking in electric transport.
We have successfully observed the second harmonic signals of resistance under magnetic field in polar semiconductor BiTeBr. The observed nonlinear signals correspond to the bulk rectification and satisfy the characteristic selection rule for polar systems. In addition, the experimental results can be quantitatively explained by the simple model using the three-dimensional Rashba model.
We further observed the nonreciprocal electric transport in chiral WS2 nanotubes. Nonreciprocal electric transport is largely enhanced in electric-field-induced superconducting state. Periodic oscillations observed both in first and second harmonic signals indicate that nonreciprocal superconducting transport is affected by the characteristic cylindrical geometry.
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Report
(3 results)
Research Products
(17 results)
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[Journal Article] Superconductivity in a chiral nanotube2017
Author(s)
F. Qin, W. Shi, T. Ideue, M. Yoshida, A. Zak, R. Tenne, T. Kikitsu, D. Inoue, D. Hashizume, Y. Iwasa
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Journal Title
Nature Communications
Volume: 3
Issue: 1
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Chiral superconducting transport in WS2 nanotube2017
Author(s)
Toshiya Ideue, Qin Feng, Wu Shi, Masaro Yoshida, Alla Zak, Reshef Tenne, Tomoka Kikitsu, Daishi Inoue, Daisuke Hashizume, Yoshihiro Iwasa
Organizer
XXXIst International Winterschool on Electronic Properties of Novel Materials
Place of Presentation
Hotel Sonnalp, Kirchberg in Tirol, Austria
Year and Date
2017-03-07
Related Report
Int'l Joint Research
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