Surface Rashba-Edelstein Spin-Orbit Torque Revealed by Molecular Self-Assembly

Satoshi Haku, Atsushi Ishikawa, Akira Musha, Hiroyasu Nakayama, Takashi Yamamoto, Kazuya Ando

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report the observation of a spin-orbit torque (SOT) originating from the surface Rashba-Edelstein effect. We find that the SOT in a prototypical spin-orbitronic system, a Pt/Co bilayer, can be manipulated by molecular self-assembly on the Pt surface. This provides evidence that the Rashba spin-orbit coupling at the Pt surface generates a sizable SOT, which is hidden by the strong bulk and interface spin-orbit coupling. We show that the molecular tuning of the surface Rashba-Edelstein SOT is consistent with density-functional-theory calculations. These results illustrate the crucial role of the surface spin-orbit coupling in the SOT generation, which alters the landscape of metallic spin-orbitronic devices.

Original languageEnglish
Article number044069
JournalPhysical Review Applied
Volume13
Issue number4
DOIs
Publication statusPublished - 2020 Apr

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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