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Room temperature depinning of the charge-density waves in quasi-two-dimensional 1T-TaS2 devices

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/5.0055401· OSTI ID:1853705
 [1];  [2];  [3];  [2];  [4];  [5];  [3];  [3]
  1. Univ. of California, Riverside, CA (United States); Univ. of California, Riverside (United States)
  2. Polish Academy of Sciences (PAS), Warsaw (Poland)
  3. Univ. of California, Riverside, CA (United States)
  4. Gdansk University of Technology (Poland)
  5. Polish Academy of Sciences (PAS), Warsaw (Poland); Warsaw Univ. of Technology (Poland); University of Montpellier (France); Centre National de la Recherche Scientifique (CNRS) (France)
Here we report on the depinning of nearly commensurate charge-density waves in 1T-TaS2 thin films at room temperature. A combination of the differential current–voltage measurements with the low-frequency noise spectroscopy provides unambiguous means for detecting the depinning threshold field in quasi-2D materials. The depinning process in 1T-TaS2 is not accompanied by an observable abrupt increase in electric current—in striking contrast to depinning in the conventional charge-density-wave materials with quasi-1D crystal structure. We explained it by the fact that the current density from the charge-density waves in the 1T-TaS2 devices is orders of magnitude smaller than the current density of the free carriers available in the discommensuration network surrounding the commensurate charge-density wave islands. The depinning fields in 1T-TaS2 thin-film devices are several orders of magnitude larger than those in quasi-1D van der Waals materials. Obtained results are important for the proposed applications of the charge-density wave devices in electronics.
Research Organization:
Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
European Union (EU); Foundation for Polish Sciences; USDOE; USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0021020
OSTI ID:
1853705
Alternate ID(s):
OSTI ID: 1785398
OSTI ID: 1904171
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 118; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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