Journal
PHYSICAL REVIEW B
Volume 99, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.99.195103
Keywords
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Funding
- U.S. Department of Energy within the NEMM program [DE-AC02-05-CH11231, KC2204]
- NSF Materials Research Science and Engineering Center [DMR-1720595]
- NSF E3S center at Berkeley
- STARNET/LEAST
- DARPA/SRC
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Harmonic measurements of the longitudinal and transverse voltages in Bi-Sb/Co bilayers are presented. A large second harmonic voltage signal due to the ordinary Nernst effect is observed. In experiments where a magnetic field is rotated in the film plane, the ordinary Nernst effect shows the same angular dependence in the transverse voltage as the dampinglike spin-orbit torque and in the longitudinal voltage as the unidirectional spin-Hall magnetoresistance, respectively. Therefore, the ordinary Nernst effect can be a spurious signal in spin-orbit torque measurements, leading to an overestimation of the spin-Hall angle and spin-Hall conductivity in topological insulators or semimetals.
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