We study the current-voltage characteristic of narrow superconducting strips in the gapless regime near the critical temperature in the framework of the Ginzburg-Landau model. Our focus is on its instabilities occurring at high current biases. The latter are consequences of dynamical states with periodic phase-slip events in space and time. We analyze their structure and derive the value of the reentrance current at the onset of the instability of the normal state. It is expressed in terms of the kinetic coefficient of the time-dependent Ginzburg-Landau equation and calculated numerically.

中文翻译：

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电流偏置的窄超导带中正常状态的不稳定性

我们在Ginzburg-Landau模型的框架内研究了在临界温度附近的无间隙状态中的窄超导带的电流-电压特性。我们的重点是在高电流偏置下其不稳定性。后者是动态状态的结果，在空间和时间上具有周期性的相移事件。我们分析它们的结构，并在正常状态不稳定开始时得出折回电流的值。它用时变的Ginzburg-Landau方程的动力学系数表示，并通过数值计算。