Electron waves in chemically substituted graphene

被引：68

作者：

Peres, N. M. R. ^{[1
,2
]}

Klironomos, F. D. ^{[3
]}

Tsai, S. -W. ^{[3
]}

Santos, J. R. ^{[1
,2
]}

dos Santos, J. M. B. Lopes ^{[4
,5
]}

Castro Neto, A. H. ^{[6
]}

机构：

[1] Univ Minho, Ctr Phys, P-4710057 Braga, Portugal

[2] Univ Minho, Dept Phys, P-4710057 Braga, Portugal

[3] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

[4] Univ Porto, CFP, P-4169007 Oporto, Portugal

[5] Univ Porto, Dept Fis, Fac Ciencias, P-4169007 Oporto, Portugal

[6] Boston Univ, Dept Phys, Boston, MA 02215 USA

来源：

EPL | 2007年 / 80卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1209/0295-5075/80/67007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present exact analytical and numerical results for the electronic spectra and the Friedel oscillations around a substitutional impurity atom in a graphene lattice. A chemical dopant in graphene introduces changes in the on-site potential as well as in the hopping amplitude. We employ a T-matrix formalism and find that disorder in the hopping introduces additional interference terms around the impurity that can be understood in terms of bound, semi-bound, and unbound processes for the Dirac electrons. These interference effects can be detected by scanning tunneling microscopy. Copyright (c) EPLA, 2007.

引用

页数：6

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