Title: Dynamical instability of the electric transport in superconductors

Journal Article · · Scientific Reports
 [1]; ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5]
  1. Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  2. Russian Academy of Sciences (RAS), Novosibirsk (Russian Federation)
  3. Russian Academy of Sciences (RAS), Novosibirsk (Russian Federation); Novosibirsk State Univ. (Russian Federation)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)
  5. National Chiao Tung Univ., Hsinchu (China); Bar-Ilan Univ., Ramat-Gan (Israel)

We develop a nonlinear theory of the electronic transport in superconductors in the framework of the time-dependent Ginzburg-Landau (TDGL) equation. We utilize self-consistent Gaussian approximation and reveal the conditions under which the current-voltage V(I) dependence (I-V characteristics) acquires an S-shape form leading to switching instabilities. We demonstrate that in two-dimensions the emergence of such an instability is a hallmark of the Berezinskii-Kosterlitz-Thou less (BKT) transition that we have detected by transport measurements of titanium nitride (TiN) films. Our theoretical findings compare favorably with our experimental results.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); Russian Science Foundation; USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1476650
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 8; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Superconducting phase transitions in disordered NbTiN films journal January 2020
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Vortex lattice instability at the nanoscale in a parallel magnetic field journal July 2019
BKT transition observed in magnetic and electric properties of YBa 2 Cu 3 O 7 − δ single crystals journal September 2019
Local flux-flow instability in superconducting films near T c journal May 2019
Electrodeposition of Nanoparticles and Continuous Film of CdSe on n-Si (100) journal October 2019
Local flux-flow instability in superconducting films near Tc text January 2019