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Title: Optical spectroscopy study of the three-dimensional Dirac semimetal ZrTe5

Abstract

Three-dimensional (3D) topological Dirac materials have been under intensive study recently. The layered compound ZrTe5 has been suggested to be one such material as a result of transport and angle-resolved photoemission spectroscopy experiments. Here, we perform infrared reflectivity measurements to investigate the underlying physics of this material. The derived optical conductivity increases linearly with frequency below normal interband transitions, which provides optical spectroscopic proof of a 3D Dirac semimetal. In addition, the plasma edge shifts dramatically to lower energy upon temperature cooling, which might be due to the shrinking of the lattice parameters. Additionally, an extremely sharp peak shows up in the frequency-dependent optical conductivity, indicating the presence of a Van Hove singularity in the joint density of state.

Authors:
 [1];  [2];  [1];  [2];  [2];  [2];  [3]
  1. Peking Univ., Beijing (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1226052
Alternate Identifier(s):
OSTI ID: 1209170
Report Number(s):
BNL-108428-2015-JA
Journal ID: ISSN 1098-0121; PRBMDO; R&D Project: MA012MABA; PO010; KC0202050; KC0201060
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 7; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chen, R. Y., Gu, G. D., Zhang, S. J., Schneeloch, J. A., Zhang, C., Li, Q., and Wang, N. L. Optical spectroscopy study of the three-dimensional Dirac semimetal ZrTe5. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.075107.
Chen, R. Y., Gu, G. D., Zhang, S. J., Schneeloch, J. A., Zhang, C., Li, Q., & Wang, N. L. Optical spectroscopy study of the three-dimensional Dirac semimetal ZrTe5. United States. https://doi.org/10.1103/PhysRevB.92.075107
Chen, R. Y., Gu, G. D., Zhang, S. J., Schneeloch, J. A., Zhang, C., Li, Q., and Wang, N. L. Wed . "Optical spectroscopy study of the three-dimensional Dirac semimetal ZrTe5". United States. https://doi.org/10.1103/PhysRevB.92.075107. https://www.osti.gov/servlets/purl/1226052.
@article{osti_1226052,
title = {Optical spectroscopy study of the three-dimensional Dirac semimetal ZrTe5},
author = {Chen, R. Y. and Gu, G. D. and Zhang, S. J. and Schneeloch, J. A. and Zhang, C. and Li, Q. and Wang, N. L.},
abstractNote = {Three-dimensional (3D) topological Dirac materials have been under intensive study recently. The layered compound ZrTe5 has been suggested to be one such material as a result of transport and angle-resolved photoemission spectroscopy experiments. Here, we perform infrared reflectivity measurements to investigate the underlying physics of this material. The derived optical conductivity increases linearly with frequency below normal interband transitions, which provides optical spectroscopic proof of a 3D Dirac semimetal. In addition, the plasma edge shifts dramatically to lower energy upon temperature cooling, which might be due to the shrinking of the lattice parameters. Additionally, an extremely sharp peak shows up in the frequency-dependent optical conductivity, indicating the presence of a Van Hove singularity in the joint density of state.},
doi = {10.1103/PhysRevB.92.075107},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 7,
volume = 92,
place = {United States},
year = {Wed Aug 05 00:00:00 EDT 2015},
month = {Wed Aug 05 00:00:00 EDT 2015}
}

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