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arXiv 1302.5330cond-mat.dis-nn
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幂律谱无序的反关联和Anderson跃迁的条件

Anticorrelations from power-law spectral disorder and conditions for an Anderson transition

Greg M. Petersen, Nancy Sandler

摘要:

我们解决了一维无序系统与幂律谱相关的数值和解析结果之间的明显矛盾。当考虑到严格的结果,限制了一组关联函数产生金属态的热力学极限与非零值的冲突。通过分析的标度律模型相关的障碍,产生的流动性边缘,我们表明,不存在矛盾的关联函数表现出强的热力学极限的相关关系。此外,相关的标度函数揭示了一个大小依赖的相关性,随着系统大小的增加,与一个平滑的无序振幅。

英文摘要:

We resolve an apparent contradiction between numeric and analytic results for one-dimensional disordered systems with power-law spectral correlations. The conflict arises when considering rigorous results that constrain the set of correlation functions yielding metallic states to those with non-zero values in the thermodynamic limit. By analyzing the scaling law for a model correlated disorder that produces a mobility edge, we show that no contradiction exists as the correlation function exhibits strong anticorrelations in the thermodynamic limit. Moreover, the associated scaling function reveals a size-dependent correlation with a smoothening of disorder amplitudes as the system size increases.

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