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

DMR-9419257 Marchetti这个项目解决了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）钉扎的涡列。 磁通线液体的流体力学将被推导和应用。 磁通晶格的具体模型进行了研究，以了解集体非线性动力学和输运驱动无序系统的一般特征。 此外，当系统从无序到有序相的对称性破缺转变时产生的拓扑缺陷的动力学也被包括作为一个新的研究方向。 这个项目的部分内容是对高温超导体中发现的线性缺陷阵列进行理论分析。 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的目标。 对这些缺陷及其运动方式的研究也应该应用于目前实验室感兴趣的其他类型的材料。 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.