MIXED IMPURITIES IN A TIGHT-BINDING MODEL

被引：5
|
作者：
PURY, PA
CANNAS, SA
机构：
[1] Fac. de Matematica, Astron. and Fisica, Univ. Nacional de Cordoba
来源：
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1991年 / 24卷 / 24期
关键词：
D O I：
10.1088/0305-4470/24/24/004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The Green function of a tight-binding model with mixed impurities is calculated exactly. The spectral properties of the one-dimensional lattice, including both extended and localized states, are also analysed exactly. We find at most two localized states which are always non-degenerate. The density of states per site in the continuum is calculated, Using a constructive procedure we obtain the localized eigenfunctions for the infinite and semi-infinite chain. Some results for three-dimensional lattices are presented.
引用
收藏
页码：L1405 / L1414
页数：10
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