Electron localization in a two-channel tight-binding model with correlated disorder

被引：25

作者：

Bagci, V. M. K. ^{[1
]}

Krokhin, A. A. ^{[1
]}

机构：

[1] Univ N Texas, Dept Phys, Denton, TX 76203 USA

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.76.134202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the localization length in a two-channel tight-binding model for correlated disordered site potential. Both intra- and interchannel correlations are taken into account. The localization length is obtained in quadratic approximation by expanding the two-channel conductance over weak disorder. The result is applied to a simple two-stranded model of DNA molecule and it is shown that a strong pair coupling between the basic nucleotides in the strands is not sufficient to delocalize electronic states.

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页数：7

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