Proceedings Paper
Observation of the circular photogalvanic effect in the Weyl semimetal TaAs using THz emission spectroscopy| Format | Member Price | Non-Member Price |
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Paper Abstract
We investigate polarization-dependent ultrafast photocurrents in theWeyl semimetal TaAs using terahertz (THz) emission spectroscopy. Our results reveal that highly directional, transient photocurrents are generated along the non-centrosymmetric c-axis regardless of incident light polarization, while helicity-dependent photocurrents are excited within the ab-plane. Such findings are consistent with earlier static photocurrent experiments, and demonstrate on the basis of both the physical constraints imposed by symmetry and the temporal dynamics intrinsic to current generation and decay that optically induced photocurrents in TaAs are inherent to the underlying crystal symmetry. Such generality in the microscopic origin of photocurrent generation in the transition metal monopnictide family of Weyl semimetals makes these materials promising candidates as next generation sources or detectors in the mid-IR and terahertz frequency ranges.
Paper Details
Date Published: 13 May 2019
PDF: 15 pages
Proc. SPIE 10983, Next-Generation Spectroscopic Technologies XII, 1098314 (13 May 2019); doi: 10.1117/12.2520318
Published in SPIE Proceedings Vol. 10983:
Next-Generation Spectroscopic Technologies XII
Richard A. Crocombe; Luisa T.M. Profeta; Abul K. Azad, Editor(s)
PDF: 15 pages
Proc. SPIE 10983, Next-Generation Spectroscopic Technologies XII, 1098314 (13 May 2019); doi: 10.1117/12.2520318
Show Author Affiliations
N. Sirica, Los Alamos National Lab. (United States)
R. I. Tobey, Los Alamos National Lab. (United States)
Univ. of Groningen (Netherlands)
L. X. Zhao, Institute of Physics (China)
G. F. Chen, Institute of Physics (China)
B. Xu, Institute of Physics (China)
R. Yang, Institute of Physics (China)
B. Shen, Univ. of California, Los Angeles (United States)
D. A. Yarotski, Los Alamos National Lab. (United States)
P. Bowlan, Los Alamos National Lab. (United States)
R. I. Tobey, Los Alamos National Lab. (United States)
Univ. of Groningen (Netherlands)
L. X. Zhao, Institute of Physics (China)
G. F. Chen, Institute of Physics (China)
B. Xu, Institute of Physics (China)
R. Yang, Institute of Physics (China)
B. Shen, Univ. of California, Los Angeles (United States)
D. A. Yarotski, Los Alamos National Lab. (United States)
P. Bowlan, Los Alamos National Lab. (United States)
S. A. Trugman, Los Alamos National Lab. (United States)
J.-X. Zhu, Los Alamos National Lab. (United States)
Y. M. Dai, Los Alamos National Lab. (United States)
Nanjing Univ. (China)
A. K. Azad, Los Alamos National Lab. (United States)
N. Ni, Univ. of California, Los Angeles (United States)
X. G. Qiu, Institute of Physics (China)
A. J. Taylor, Los Alamos National Lab. (United States)
R. P. Prasankumar, Los Alamos National Lab. (United States)
J.-X. Zhu, Los Alamos National Lab. (United States)
Y. M. Dai, Los Alamos National Lab. (United States)
Nanjing Univ. (China)
A. K. Azad, Los Alamos National Lab. (United States)
N. Ni, Univ. of California, Los Angeles (United States)
X. G. Qiu, Institute of Physics (China)
A. J. Taylor, Los Alamos National Lab. (United States)
R. P. Prasankumar, Los Alamos National Lab. (United States)
Published in SPIE Proceedings Vol. 10983:
Next-Generation Spectroscopic Technologies XII
Richard A. Crocombe; Luisa T.M. Profeta; Abul K. Azad, Editor(s)
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