Two-dimensional electron gas in a uniform magnetic field in the presence of a δ-impurity

被引：18
|
作者：
Cavalcanti, RM
de Carvalho, CAA
机构：
[1] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22452970 Rio De Janeiro, Brazil
[2] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil
来源：
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1998年 / 31卷 / 10期
关键词：
D O I：
10.1088/0305-4470/31/10/014
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The density of states and the Hall conductivity of a two-dimensional electron gas in a uniform magnetic field and in the presence of a delta-impurity are exactly calculated using elementary field theoretic techniques. The impurity creates one localized state per Landau level, but the Hall conductivity is unaffected. Our treatment is explicitly gauge invariant, and can be easily adapted to other problems involving zero-range potentials.
引用
收藏
页码：2391 / 2399
页数：9
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