Browsing by Author "Mironov, Alexey Yu."

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Dynamical instability of the electric transport in superconductors
(2018-09-20)
Qiao, Lei
;
Li, Dingping
;
Postolova, Svetlana V.
;
Mironov, Alexey Yu.
;
Vinokur, Valerii
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.