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Title: Temperature-induced inversion of the spin-photogalvanic effect in WTe 2 and MoTe 2

In this study, we investigate the generation and temperature-induced evolution of optically driven spin photocurrents in WTe 2 and MoTe 2. 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 ~150 K is attributed to the temperature-induced Lifshitz transition. Finally, the sign inversion of the spin photocurrent, observed around 50 K in WTe 2 and around 120 K in MoTe 2, may have its origin in an interaction that involves multiple kinds of carriers.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [3]
  1. Stanford Univ., CA (United States). Department of Applied Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences
  2. Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
  3. Stanford Univ., CA (United States). Department of Applied Physics and Department of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences
Publication Date:
Grant/Contract Number:
AC02-76SF00515; GBMF4529
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 12; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE
OSTI Identifier:
1475408

Lim, Sejoon, Rajamathi, Catherine R., Süß, Vicky, Felser, Claudia, and Kapitulnik, Aharon. Temperature-induced inversion of the spin-photogalvanic effect in WTe2 and MoTe2. United States: N. p., Web. doi:10.1103/physrevb.98.121301.
Lim, Sejoon, Rajamathi, Catherine R., Süß, Vicky, Felser, Claudia, & Kapitulnik, Aharon. Temperature-induced inversion of the spin-photogalvanic effect in WTe2 and MoTe2. United States. doi:10.1103/physrevb.98.121301.
Lim, Sejoon, Rajamathi, Catherine R., Süß, Vicky, Felser, Claudia, and Kapitulnik, Aharon. 2018. "Temperature-induced inversion of the spin-photogalvanic effect in WTe2 and MoTe2". United States. doi:10.1103/physrevb.98.121301.
@article{osti_1475408,
title = {Temperature-induced inversion of the spin-photogalvanic effect in WTe2 and MoTe2},
author = {Lim, Sejoon and Rajamathi, Catherine R. and Süß, Vicky and Felser, Claudia and Kapitulnik, Aharon},
abstractNote = {In this study, 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 ~150 K is attributed to the temperature-induced Lifshitz transition. Finally, 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.},
doi = {10.1103/physrevb.98.121301},
journal = {Physical Review B},
number = 12,
volume = 98,
place = {United States},
year = {2018},
month = {9}
}

Works referenced in this record:

Control over topological insulator photocurrents with light polarization
journal, December 2011
  • McIver, J. W.; Hsieh, D.; Steinberg, H.
  • Nature Nanotechnology, Vol. 7, Issue 2, p. 96-100
  • DOI: 10.1038/nnano.2011.214