Dynamical instability of the electric transport in superconductors

Lei Qiao, Dingping Li, Svetlana V. Postolova, Alexey Yu Mironov*, Valerii Vinokur, Rosenstein Baruch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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-Thouless (BKT) transition that we have detected by transport measurements of titanium nitride (TiN) films. Our theoretical findings compare favorably with our experimental results.

Original languageEnglish
Article number14104
JournalScientific reports
Issue number1
StatePublished - 1 Dec 2018

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