文章基本信息

标题：Dynamical instability of the electric transport in superconductors
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作者：Lei Qiao ; Dingping Li ; Svetlana V. Postolova 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2018
卷号：8
期号：1
页码：14104
DOI：10.1038/s41598-018-32302-8
语种：English
出版社：Springer Nature
摘要：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.