Coulomb impurity in graphene

被引：67

作者：

Biswas, Rudro R. ^{[1
]}

Sachdev, Subir

Son, Dam T.

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 20期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.76.205122

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We consider the problem of screening of an electrically charged impurity in a clean graphene sheet. When electron-electron interactions are neglected, the screening charge has a sign opposite to that of the impurity and is localized near the impurity. Interactions between electrons smear out the induced charge density to give a large-distance tail that follows approximately, but not exactly, an r(-2) behavior and with a sign which is the same as that of the impurity.

引用

页数：5

共 13 条

[1] SELF-CONSISTENT EFFECTIVE-MASS THEORY FOR INTRALAYER SCREENING IN GRAPHITE-INTERCALATION COMPOUNDS [J].