Delocalization due to correlations in two-dimensional disordered systems

被引：0
作者：
G. Vasseur
D. Weinmann
机构：
[1] Institut de Physique et Chimie des Matériaux de Strasbourg (UMR 7504 (CNRS-ULP)),
来源：
The European Physical Journal B - Condensed Matter and Complex Systems | 2004年 / 42卷
关键词：
Spectroscopy; Neural Network; State Physics; Complex System; Nonlinear Dynamics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We study the spectral statistics of interacting spin-less fermions in a two-dimensional disordered lattice. Within a full quantum treatment for small few-particle systems, we compute the low-energy many-body states numerically. While at weak disorder the interactions reduce spectral correlations and lead to localization, for the case of strong disorder we find that a moderate Coulomb interaction has a delocalizing effect. In addition, we observe a non-universal structure in the level-spacing distribution which we attribute to a mechanism reinforcing spectral correlations taking place in small systems at strong disorder.
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页码：279 / 284
页数：5
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