Chiral terahertz wave emission from the Weyl semimetal TaAs

Y. Gao; S. Kaushik; E. J. Philip; Z. Li; Y. Qin; Y. P. Liu; W. L. Zhang; Y. L. Su; X. Chen; H. Weng; D. E. Kharzeev; M. K. Liu; J. Qi

doi:10.1038/s41467-020-14463-1

Nature Communications (Feb 2020)

Chiral terahertz wave emission from the Weyl semimetal TaAs

Y. Gao,
S. Kaushik,
E. J. Philip,
Z. Li,
Y. Qin,
Y. P. Liu,
W. L. Zhang,
Y. L. Su,
X. Chen,
H. Weng,
D. E. Kharzeev,
M. K. Liu,
J. Qi

Affiliations

Y. Gao: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China
S. Kaushik: Department of Physics and Astronomy, Stony Brook University
E. J. Philip: Department of Physics and Astronomy, Stony Brook University
Z. Li: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Beijing Key Laboratory of Quantum Devices, Peking University
Y. Qin: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China
Y. P. Liu: Institute of Modern Physics, Fudan University
W. L. Zhang: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China
Y. L. Su: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China
X. Chen: Department of Physics and Astronomy, Stony Brook University
H. Weng: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
D. E. Kharzeev: Department of Physics and Astronomy, Stony Brook University
M. K. Liu: Department of Physics and Astronomy, Stony Brook University
J. Qi: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China

DOI: https://doi.org/10.1038/s41467-020-14463-1
Journal volume & issue: Vol. 11, no. 1
pp. 1 – 10

Abstract

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Here, the authors report photon-energy-dependent terahertz emission and ultrafast photocurrents from the Weyl semimetal, TaAs. The polarization control of the emission is achieved by excitation of the photocurrents whose direction and magnitude depend on the polarization of the femtosecond optical pulses.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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