TY - JOUR
T1 - Intrinsic Spin-Orbit Torque Arising from the Berry Curvature in a Metallic-Magnet/Cu-Oxide Interface
AU - Gao, Tenghua
AU - Qaiumzadeh, Alireza
AU - An, Hongyu
AU - Musha, Akira
AU - Kageyama, Yuito
AU - Shi, Ji
AU - Ando, Kazuya
N1 - Funding Information:
We thank Takashi Harumoto for assistance on the Auger electron spectroscopy (AES) measurements. This work was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI Grants No. 26220604 and No. 26103004, the Asahi Glass Foundation, JSPS Core-to-Core Program, and Spintronics Research Network of Japan (Spin-RNJ). H. A. acknowledges the support from the JSPS Fellowship (No. P17066). A. Q. was supported by the European Research Council via Advanced Grant No. 669442 “Insulatronics” and the Research Council of Norway through its Centres of Excellence funding scheme, Project No. 262633 “QuSpin.” We also thank the referee who helped, with useful comments, to clarify the Oersted field contribution in the STFMR measurements.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/7/6
Y1 - 2018/7/6
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.121.017202
DO - 10.1103/PhysRevLett.121.017202
M3 - Article
C2 - 30028148
AN - SCOPUS:85049836562
SN - 0031-9007
VL - 121
JO - Physical review letters
JF - Physical review letters
IS - 1
M1 - 017202
ER -