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Title: Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1 T - TaS 2

Abstract

The electric field dependence of the dielectric properties and the nonlinear conductance of 1T-TaS2 below 50 K has been investigated. A large dielectric constant of about 104 is obtained up to 107 Hz, which cannot be attributed to hopping of the localized carriers alone, the collective excitations of the commensurate charge-density-wave must be another contributor. The dielectric spectra disperse slightly in our measured temperature and frequency range. At a moderate dc bias field, the real part of the dielectric constant ε1(ω) decreases. Lastly, we propose that the separation of bound soliton-antisoliton pairs may be a contributor to the reduction of ε1(ω) and the accompanying nonlinear conductivity with increasing dc bias.

Authors:
 [1];  [2];  [3];  [4];  [4]
  1. Tianjin Univ. of Technology, Tianjin (China). School of Materials Science and Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Tianjin Univ. of Technology, Tianjin (China). Key Lab. of Display Materials and Photoelectric Devices
  2. Tianjin Univ. of Technology, Tianjin (China). School of Materials Science and Engineering
  3. Tianjin Univ. of Technology, Tianjin (China). School of Materials Science and Engineering; Tianjin Key Lab. for Photoelectric Materials and Devices, Tianjin (China)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation of China
OSTI Identifier:
1457352
Alternate Identifier(s):
OSTI ID: 1436825
Report Number(s):
BNL-205801-2018-JAAM
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1901365
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 19; 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

Ma, Yongchang, Hou, Yanhui, Lu, Cuimin, Li, Lijun, and Petrovic, Cedomir. Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS2. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.195117.
Ma, Yongchang, Hou, Yanhui, Lu, Cuimin, Li, Lijun, & Petrovic, Cedomir. Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS2. United States. https://doi.org/10.1103/PhysRevB.97.195117
Ma, Yongchang, Hou, Yanhui, Lu, Cuimin, Li, Lijun, and Petrovic, Cedomir. Thu . "Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS2". United States. https://doi.org/10.1103/PhysRevB.97.195117. https://www.osti.gov/servlets/purl/1457352.
@article{osti_1457352,
title = {Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS2},
author = {Ma, Yongchang and Hou, Yanhui and Lu, Cuimin and Li, Lijun and Petrovic, Cedomir},
abstractNote = {The electric field dependence of the dielectric properties and the nonlinear conductance of 1T-TaS2 below 50 K has been investigated. A large dielectric constant of about 104 is obtained up to 107 Hz, which cannot be attributed to hopping of the localized carriers alone, the collective excitations of the commensurate charge-density-wave must be another contributor. The dielectric spectra disperse slightly in our measured temperature and frequency range. At a moderate dc bias field, the real part of the dielectric constant ε1(ω) decreases. Lastly, we propose that the separation of bound soliton-antisoliton pairs may be a contributor to the reduction of ε1(ω) and the accompanying nonlinear conductivity with increasing dc bias.},
doi = {10.1103/PhysRevB.97.195117},
journal = {Physical Review B},
number = 19,
volume = 97,
place = {United States},
year = {Thu May 10 00:00:00 EDT 2018},
month = {Thu May 10 00:00:00 EDT 2018}
}

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Cited by: 10 works
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Works referencing / citing this record:

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