2020年9月3日
Electrical evaluation of the alternating spin current generated via spin-vorticity coupling
Physical Review B
- ,
- ,
- ,
- 巻
- 102
- 号
- 10
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/physrevb.102.104406
- 出版者・発行元
- American Physical Society (APS)
In many interacting-electron systems, the microscopic spin angular momentum of electrons is conserved along with the macroscopic angular momentum in electrical current flows, i.e., vorticity. Such spin-vorticity coupling expands the choice of materials for spintronics devices. In this paper, we evaluate the magnitude of an alternating spin current generated by the spin-vorticity coupling with a gigahertz-order surface acoustic wave in a Cu thin film. We measure the gigahertz alternating spin current by an electrical method based on the inverse spin-Hall effect. From the amplitude of the spin current, we can determine the conversion efficiency of the angular momentum between local lattice rotation and electron spin in the Cu film. The conversion efficiency is four orders of magnitude larger than the case of spin current generation via kilohertz-order vorticity in turbulent flow of liquid mercury [M. Matsuo et al., Phys. Rev. B 96, 020401(R) (2017)]. Such a huge conversion efficiency is attributable to a smaller inconsistency of energy scale between lattice rotation and electron spin than the case of liquid vorticity.
- リンク情報
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- DOI
- https://doi.org/10.1103/physrevb.102.104406
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000565455400004&DestApp=WOS_CPL
- 共同研究・競争的資金等の研究課題
- ナノ構造制御と計算科学を融合した傾斜材料開発とスピンデバイス応用
- 共同研究・競争的資金等の研究課題
- 音波を用いたスピン流の高効率生成と伝導制御に関する研究
- URL
- https://link.aps.org/article/10.1103/PhysRevB.102.104406
- URL
- http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.102.104406/fulltext
- ID情報
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- DOI : 10.1103/physrevb.102.104406
- ISSN : 2469-9950
- eISSN : 2469-9969
- Web of Science ID : WOS:000565455400004