Nonreciprocal Spin Current Generation in Surface-Oxidized Copper Films

Genki Okano, Mamoru Matsuo, Yuichi Ohnuma, Sadamichi Maekawa, Yukio Nozaki

研究成果: Article査読

15 被引用数 (Scopus)

抄録

We experimentally demonstrate the nonreciprocal generation of spin current (Js) in a surface-oxidized copper film. The efficiency of conversion is at least 320 times larger than the inverse conversion. This nonreciprocity is due to a novel type of Js generation, which relies on the transfer of angular momentum from the velocity field of free electrons. A gradient in the electrical mobility in the film produces vorticity in the in-plane drift velocity of the free electrons. The inverse process can hardly occur when Js is collinear with the gradient in the electrical mobility.

本文言語English
論文番号217701
ジャーナルPhysical review letters
122
21
DOI
出版ステータスPublished - 2019 5 29

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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