标题： 不均匀超导体中的超电流流动 显示英文标题

标题： Supercurrent flow in inhomogeneous superconductors

摘要： 我们研究了超导薄膜中的不均匀性如何改变超流密度的流动模式。 在临界温度附近工作，并假设吉尔伯特-兰道泛函二次项中的短程无序模型，我们发展了一种关于不均匀性强度的微扰理论。 将紫外发散吸收进临界温度的重整化中，我们得到一个由大尺度物理支配的明确理论。 在存在不均匀性的情况下，序参量和超流密度的相关函数表现出长程幂律行为，这可以归因于振幅模和相位模的混合。 涨落幅度随着平均电流的增加而增大，系统在临界电流附近变得高度不均匀。 显示英文摘要

摘要： We study how the supercurrent flow pattern is altered by inhomogeneities in superconducting films. Working in the vicinity of the critical temperature and assuming a model of short-range disorder in the quadratic term of the Ginzburg-Landau functional, we develop a perturbation theory in the inhomogeneity strength. Absorbing the ultraviolet divergences into the renormalization of the critical temperature, we arrive at a well-defined theory governed by large-scale physics. In the presence of inhomogeneities, the correlation functions of the order parameter and supercurrent exhibit a long-range power-law behavior, which can be attributed to the mixing of the amplitude and phase modes. The fluctuation magnitude grows with increasing the average current, and the system becomes strongly inhomogeneous near the critical current.