TY - JOUR
T1 - Surface Rashba-Edelstein Spin-Orbit Torque Revealed by Molecular Self-Assembly
AU - Haku, Satoshi
AU - Ishikawa, Atsushi
AU - Musha, Akira
AU - Nakayama, Hiroyasu
AU - Yamamoto, Takashi
AU - Ando, Kazuya
N1 - Funding Information:
This work was supported by the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI) under Grants No. 19H00864, No. 26220604, No. 26103004, No. 18J20780, and No. 17H04808 and by the Asahi Glass Foundation, the Kao Foundation for Arts and Sciences, the Canon Foundation, the JGC-S Scholarship Foundation, and the Spintronics Research Network of Japan (Spin-RNJ).
Publisher Copyright:
© 2020 American Physical Society. © 2020 American Physical Society.
PY - 2020/4
Y1 - 2020/4
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevApplied.13.044069
DO - 10.1103/PhysRevApplied.13.044069
M3 - Article
AN - SCOPUS:85085145341
SN - 2331-7019
VL - 13
JO - Physical Review Applied
JF - Physical Review Applied
IS - 4
M1 - 044069
ER -