Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS2

doi:10.1103/PhysRevB.97.195117

This content will become publicly available on May 10, 2019

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

The electric field dependence of the dielectric properties and the nonlinear conductance of 1T-TaS ₂ below 50 K has been investigated. A large dielectric constant of about 10 ⁴ is obtained up to 10 ⁷ 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 ε ₁(ω) decreases. Lastly, we propose that the separation of bound soliton-antisoliton pairs may be a contributor to the reduction of ε ₁(ω) and the accompanying nonlinear conductivity with increasing dc bias.

Authors:

Ma, Yongchang ^[1] ; Hou, Yanhui ^[2] ; Lu, Cuimin ^[3] ; Li, Lijun ^[4] ; Petrovic, Cedomir ^[4]

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
Tianjin Univ. of Technology, Tianjin (China). School of Materials Science and Engineering
Tianjin Univ. of Technology, Tianjin (China). School of Materials Science and Engineering; Tianjin Key Lab. for Photoelectric Materials and Devices, Tianjin (China)
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

Publication Date:: 2018-05-10

Report Number(s):: BNL-205801-2018-JAAM
Journal ID: ISSN 2469-9950; PRBMDO

Grant/Contract Number:: SC0012704

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)

Research Org:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Org:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation of China

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

OSTI Identifier:: 1457352

Alternate Identifier(s):: OSTI ID: 1436825


                    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.,  
        Web.  doi:10.1103/PhysRevB.97.195117.

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                    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.  doi:10.1103/PhysRevB.97.195117.

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                    Ma, Yongchang, Hou, Yanhui, Lu, Cuimin, Li, Lijun, and Petrovic, Cedomir. 2018.  
        "Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS2".  United States.  
        doi:10.1103/PhysRevB.97.195117.

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@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         = {2018},

  month        = {5}

}

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Free Publicly Accessible Full Text
This content will become publicly available on May 10, 2019
Publisher's Version of Record
10.1103/PhysRevB.97.195117
https://doi.org/10.1103/PhysRevB.97.195117

Works referenced in this record:

Polarons in crystalline and non-crystalline materials
journal, January 1969

Austin, I. G.; Mott, N. F.
Advances in Physics, Vol. 18, Issue 71, p. 41-102
DOI: 10.1080/00018736900101267

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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

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