Theoretical Studies of Flux-Line Arrays in Superconductors and Collective Transport in Random Media

这个项目涉及非平衡超导和非线性集体输运的几个理论方面。研究了由扩展缺陷（如孪晶界）钉住的涡阵列。将推导和应用通量线流体的流体力学。研究了通量格的特定模型，以了解驱动无序系统中集体非线性动力学和输运的一般特征。此外，系统从无序相位到有序相位经过对称破缺转变淬火时所产生的拓扑缺陷动力学也作为一个新的研究方向。这个项目部分涉及对高温超导体中发现的线性缺陷阵列的理论分析。这种理解应该有助于控制这些材料的各种应用中存在的能量损失。对这些缺陷及其移动方式的研究也应应用于目前在实验室中感兴趣的其他类别的材料。作为这项工作的一部分，计划与阿贡国家实验室的实验学家和理论家密切合作。

DMR-9419257 Marchetti This project addresses several theoretical aspects of nonequilibrium superconductivity and nonlinear collective transport. Vortex arrays pinned by extended defects, such as twin boundaries, are studied. The hydrodynamics of flux- line liquids will be derived and applied. Specific models for flux lattices are studied to understand the general features of collective nonlinear dynamics and transport in driven disordered systems. Also, the dynamics of topological defects produced when a systems is quenched from a disordered to an ordered phase across a symmetry breaking transition is also included as a new direction of research. %%% This project concerns, in part, a theoretical analysis of arrays of linear defects found in high temperature superconductors. This understanding should contribute to the goal of controlling the energy loss present in a variety of applications of these materials. The study of these defects and how they move should also have applications to other classes of materials which are currently of interest in the laboratory. A close collaboration with experimentalists and theorists at Argonne National laboratory is planned as part of this work.