NUMERICAL RESULTS FOR ELECTRON LOCALIZATION WITH SITE-DIAGONAL AND OFF-DIAGONAL DISORDER

被引：13

作者：

TSUJINO, K ^{[1
]}

YAMAMOTO, M ^{[1
]}

TOKUNAGA, A ^{[1
]}

YONEZAWA, F ^{[1
]}

机构：

[1] KYOTO UNIV,FUNDAMENTAL PHYS RES INST,KYOTO 606,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 30卷 / 09期

关键词：

D O I：

10.1016/0038-1098(79)91131-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Numerical calculations of eigenfunctions and the participation ratio P are carried out for a two-dimensional square lattice where the site diagonal and/or off-diagonal matrix elements of a one-electron Hamiltonian are disordered. We show that, for purely off-diagonal disorder, states near the centre of the band will never be localized but states in the wings of the band are localized. We also see that the combined effects of diagonal and off-diagonal disorder yield several interesting results. Moreover, we confirm that, as suggested by Economou and Antoniou, the mobility-edge surface takes a bottle-neck shape in the three-dimensional space defined by energy E, the degree of diagonal randomness Γ and the degree of off-diagonal randomness V1. © 1979.

引用

页码：531 / 536

页数：6

共 8 条

[1] ABSENCE OF DIFFUSION IN CERTAIN RANDOM LATTICES [J].