The geometric mean density of states and its application to one-dimensional nonuniform systems

被引：12

作者：

Zhang, L. ^{[1
]}

Gong, L. Y. ^{[2
]}

Tong, P. Q. ^{[1
]}

机构：

[1] Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Coll Sci, Ctr Optofluid Technol, Nanjing 210003, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL B | 2011年 / 80卷 / 04期

关键词：

ANDERSON LOCALIZATION; GREENS-FUNCTION; MODEL; ABSENCE;

D O I：

10.1140/epjb/e2011-20062-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By using the measure of the ratio R of the geometric mean of the local density of states (LDOS) and the arithmetic mean of LDOS, the localization properties can be efficiently characterized in one-dimensional nonuniform single-electron and two-interacting-particle (TIP) systems. For single-electron systems, the extended and localized states can be distinguished by the ratio R. There are sharp transitions in the ratio R at mobility edges. For TIP systems, the localization properties of particle states can also be reflected by the ratio R. These results are in accordance with what obtained by other methods. Therefore, the ratio R is a suitable quantity to characterize the localization properties of particle states for these 1D nonuniform systems.

引用

页码：485 / 492

页数：8

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