Intrinsic Spin-Orbit Torque Arising from the Berry Curvature in a Metallic-Magnet/Cu-Oxide Interface

Tenghua Gao, Alireza Qaiumzadeh, Hongyu An, Akira Musha, Yuito Kageyama, Ji Shi, Kazuya Ando

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We report the observation of the intrinsic dampinglike spin-orbit torque (SOT) arising from the Berry curvature in metallic-magnet/CuOx heterostructures. We show that a robust dampinglike SOT, an order of magnitude larger than a fieldlike SOT, is generated in the heterostructure despite the absence of the bulk spin-orbit effect in the CuOx layer. Furthermore, by tuning the interfacial oxidation level, we demonstrate that the fieldlike SOT changes drastically and even switches its sign, which originates from oxygen-modulated spin-dependent disorder. These results provide important information for a fundamental understanding of the physics of the SOTs.

Original languageEnglish
Article number017202
JournalPhysical review letters
Volume121
Issue number1
DOIs
Publication statusPublished - 2018 Jul 6

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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