DELOCALIZATION IN ONE-DIMENSIONAL TOPOLOGICALLY DISORDERED SYSTEMS

被引：2

作者：

Brezini, A. ^{[1
]}

Fulde, P. ^{[1
]}

Dairi, M. ^{[2
]}

Zanoun, A. ^{[3
]}

机构：

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[2] ENSET, Dept Chim Phys, Oran 31000, Algeria

[3] ENSET, Dept Mecan, LaRTFM, Oran 31000, Algeria

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2009年 / 23卷 / 25期

关键词：

Disorder; Anderson localization; correlation; localization length; conductance; one dimension; RANDOM-DIMER MODEL; SEMICONDUCTOR SUPERLATTICES; CONDUCTING POLYMERS; WEAK-LOCALIZATION; EXTENDED STATES; ABSENCE; SCATTERING; DIFFUSION; TRANSPORT; DYNAMICS;

D O I：

10.1142/S0217979209054107

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A Kronig-Penney model with short-range correlated impurities is used to investigate the electronic transport properties of one-dimensional disordered systems simulating both superlattices, protein chains, and polymers. Physical magnitudes characterizing the electronic charge transfer are analytically the transmission coefficient and the localization length. It is shown that a set of delocalized states occurs at particular well-defined energies. The divergence of the localization length is investigated and a critical exponent 1 is found for the barrier case which differs with the results of literature. These results support the idea that the nature of the extended states depend on the typical nature of the correlation in disorder. On this basis, the conductance of disordered superlattices is investigated as well as the relative fluctuations of the transmission coefficient.

引用

页码：4987 / 4992

页数：6

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