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arXiv 1810.04728cond-mat.dis-nn
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系统量子集团典型介质方法研究强无序电子系统的局域化

Systematic Quantum Cluster Typical Medium Method For the Study of Localization in Strongly Disordered Electronic Systems

Hanna Terletska, Yi Zhang, Ka Ming Tam, Tom Berlijn, L. Chioncel, N. S. Vidhyadhiraja, Mark Jarrell

摘要:

在过去的几年里,对无序电子系统性质的理解取得了很大的进展。在某种程度上,这是由于量子有效介质方法的最新进展,使研究无序和电子-电子相互作用成为可能。它们包括动力学平均场论和相干势近似,以及它们的团簇扩展,动力学团簇近似。尽管他们的成功,这些方法不能使第一性原理研究的强烈无序制度,包括电子本地化的影响。本文主要介绍近年来发展起来的无序电子系统的典型介质动力学团簇近似。这种方法已被构造为捕获无序诱导的本地化,是基于一个映射的晶格到嵌入在一个有效的典型介质,这是确定自洽的量子簇。在这里,我们提供了一个典型的介质动力学集团近似的各种最近的应用程序的各种模型和系统,包括单带和多带安德森模型,模型与本地和非对角无序的概述。然后,我们提出的应用程序的方法,以现实系统的密度泛函理论的框架。

英文摘要:

Great progress has been made in the last several years towards understanding the properties of disordered electronic systems. In part, this is made possible by recent advances in quantum effective medium methods which enable the study of disorder and electron-electronic interactions on equal footing. They include dynamical mean field theory and the coherent potential approximation, and their cluster extension, the dynamical cluster approximation. Despite their successes, these methods do not enable the first-principles study of the strongly disordered regime, including the effects of electronic localization. The main focus of this review is the recently developed typical medium dynamical cluster approximation for disordered electronic systems. This method has been constructed to capture disorder-induced localization, and is based on a mapping of a lattice onto a quantum cluster embedded in an effective typical medium, which is determined self-consistently. Here we provide an overview of various recent applications of the typical medium dynamical cluster approximation to a variety of models and systems, including single and multi-band Anderson model, and models with local and off-diagonal disorder. We then present the application of the method to realistic systems in the framework of the density functional theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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