Temperature-induced inversion of the spin-photogalvanic effect in WTe2and MoTe2
Lim S, Rajamathi CR, Suess V, Felser C, Kapitulnik A (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 98
Article Number: 121301
Journal Issue: 12
DOI: 10.1103/PhysRevB.98.121301
Abstract
We investigate the generation and temperature-induced evolution of optically driven spin photocurrents in WTe2 and MoTe2. By correlating the scattering-plane dependence of the spin photocurrents with the symmetry analysis, we find that a sizable spin photocurrent can be controllably driven along the chain direction by optically exciting the system in the high-symmetry y-z plane. Temperature dependence measurements show that pronounced variations in the spin photocurrent emerge at temperatures that coincide with the onset of anomalies in their transport and optical properties. The decreasing trend in the temperature dependence starting below ∼150K is attributed to the temperature-induced Lifshitz transition. The sign inversion of the spin photocurrent, observed around 50 K in WTe2 and around 120 K in MoTe2, may have its origin in an interaction that involves multiple kinds of carriers.
Involved external institutions
Stanford University
United States (USA) (US)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
United States (USA) (US)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
How to cite
APA:
Lim, S., Rajamathi, C.R., Suess, V., Felser, C., & Kapitulnik, A. (2018). Temperature-induced inversion of the spin-photogalvanic effect in WTe2and MoTe2. Physical Review B, 98(12). https://doi.org/10.1103/PhysRevB.98.121301
MLA:
Lim, Sejoon, et al. "Temperature-induced inversion of the spin-photogalvanic effect in WTe2and MoTe2." Physical Review B 98.12 (2018).
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