Anisotropic electrodynamics of type-II Weyl semimetal candidate
Abstract
We investigated the ab-plane optical properties of single crystals of WTe2 for light polarized parallel and perpendicular to the W-chain axis over a broad range of frequency and temperature. At far-infrared frequencies, we observed a striking dependence of the reflectance edge on light polarization, corresponding to anisotropy of the carrier effective masses. We quantitatively studied the temperature dependence of the plasma frequency, revealing a modest increase of the effective mass anisotropy in the ab plane upon cooling. We also found strongly anisotropic interband transitions persisting to high photon energies. These results were analyzed by comparison with ab initio calculations. The calculated and measured plasma frequencies agree to within 10% for both polarizations, while the calculated interband conductivity shows excellent agreement with experiment.
- Authors:
-
- Univ. of California, San Diego, CA (United States). Dept. of Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Condensed Matter Physics and Materials Science
- Princeton Univ., NJ (United States). Dept. of Chemistry
- Univ. of California, San Diego, CA (United States). Dept. of Physics; Columbia Univ., New York, NY (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Gordon and Betty Moore Foundation
- OSTI Identifier:
- 1376187
- Alternate Identifier(s):
- OSTI ID: 1372532
- Report Number(s):
- BNL-114173-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO; R&D Project: PO016; KC0202020; TRN: US1702802
- Grant/Contract Number:
- SC0012704; DMR1420541; DMR1609096
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 24; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Frenzel, A. J., Homes, C. C., Gibson, Q. D., Shao, Y. M., Post, K. W., Charnukha, A., Cava, R. J., and Basov, D. N. Anisotropic electrodynamics of type-II Weyl semimetal candidate WTe2. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.95.245140.
Frenzel, A. J., Homes, C. C., Gibson, Q. D., Shao, Y. M., Post, K. W., Charnukha, A., Cava, R. J., & Basov, D. N. Anisotropic electrodynamics of type-II Weyl semimetal candidate WTe2. United States. https://doi.org/10.1103/PhysRevB.95.245140
Frenzel, A. J., Homes, C. C., Gibson, Q. D., Shao, Y. M., Post, K. W., Charnukha, A., Cava, R. J., and Basov, D. N. Fri .
"Anisotropic electrodynamics of type-II Weyl semimetal candidate WTe2". United States. https://doi.org/10.1103/PhysRevB.95.245140. https://www.osti.gov/servlets/purl/1376187.
@article{osti_1376187,
title = {Anisotropic electrodynamics of type-II Weyl semimetal candidate WTe2},
author = {Frenzel, A. J. and Homes, C. C. and Gibson, Q. D. and Shao, Y. M. and Post, K. W. and Charnukha, A. and Cava, R. J. and Basov, D. N.},
abstractNote = {We investigated the ab-plane optical properties of single crystals of WTe2 for light polarized parallel and perpendicular to the W-chain axis over a broad range of frequency and temperature. At far-infrared frequencies, we observed a striking dependence of the reflectance edge on light polarization, corresponding to anisotropy of the carrier effective masses. We quantitatively studied the temperature dependence of the plasma frequency, revealing a modest increase of the effective mass anisotropy in the ab plane upon cooling. We also found strongly anisotropic interband transitions persisting to high photon energies. These results were analyzed by comparison with ab initio calculations. The calculated and measured plasma frequencies agree to within 10% for both polarizations, while the calculated interband conductivity shows excellent agreement with experiment.},
doi = {10.1103/PhysRevB.95.245140},
journal = {Physical Review. B},
number = 24,
volume = 95,
place = {United States},
year = {Fri Jun 30 00:00:00 EDT 2017},
month = {Fri Jun 30 00:00:00 EDT 2017}
}
Web of Science
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