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

共 43 条

[1] IMPURITY-INDUCED VIRTUAL BOUND-STATES IN D-WAVE SUPERCONDUCTORS [J].

BALATSKY, AV ;

SALKOLA, MI ;

ROSENGREN, A .

PHYSICAL REVIEW B, 1995, 51 (21) :15547-15551

[2] Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics [J].

Berger, C ;

Song, ZM ;

Li, TB ;

Li, XB ;

Ogbazghi, AY ;

Feng, R ;

Dai, ZT ;

Marchenkov, AN ;

Conrad, EH ;

First, PN ;

de Heer, WA .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (52) :19912-19916

[3] Edge and surface states in the quantum Hall effect in graphene [J].

Castro Neto, A. H. ;

Guinea, F. ;

Peres, N. M. R. .

PHYSICAL REVIEW B, 2006, 73 (20)

[4]

Castro Neto AH, 2006, PHYS WORLD, V19, P33

[5] Friedel oscillations, impurity scattering, and temperature dependence of resistivity in graphene [J].

Cheianov, Vadim V. ;

Fal'ko, Vladimir I. .

PHYSICAL REVIEW LETTERS, 2006, 97 (22)

[6] Effects of topological defects and local curvature on the electronic properties of planar graphene [J].

Cortijo, Alberto ;

Vomediano, Maria A. H. .

NUCLEAR PHYSICS B, 2007, 763 (03) :293-308

[7] Structure and energetics of the vacancy in graphite [J].

El-Barbary, AA ;

Telling, RH ;

Ewels, CP ;

Heggie, MI ;

Briddon, PR .

PHYSICAL REVIEW B, 2003, 68 (14)

[8] Scanning tunneling microscope study of boron-doped highly oriented pyrolytic graphite [J].

Endo, M ;

Hayashi, T ;

Hong, SH ;

Enoki, T ;

Dresselhaus, MS .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (11) :5670-5674

[9] The rise of graphene [J].

Geim, A. K. ;

Novoselov, K. S. .

NATURE MATERIALS, 2007, 6 (03) :183-191

[10] Large-scale synthesis and HRTEM analysis of single-walled B- and N-doped carbon nanotube bundles [J].

Golberg, D ;

Bando, Y ;

Bourgeois, L ;

Kurashima, K ;

Sato, T .

CARBON, 2000, 38 (14) :2017-2027

← 1 2 3 4 5 →