Dynamical instability of the electric transport in superconductors

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

doi:10.1038/s41598-018-32302-8

Dynamical instability of the electric transport in superconductors

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

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

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 language	English
Article number	14104
Pages (from-to)	14104
Number of pages	7
Journal	Scientific Reports
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41598-018-32302-8
Publication status	Published - 20 Sep 2018

Keywords

CONDUCTIVITY
COVARIANT GAUSSIAN APPROXIMATION
II SUPERCONDUCTORS
MAGNETIC-FIELD
STATE
THIN-FILMS
TRANSITION

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abstract = "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.",

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AU - Vinokur, Valerii

AU - Rosenstein, Baruch

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Dynamical instability of the electric transport in superconductors

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Keywords

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