Electron waves in chemically substituted graphene

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Peres, NMR (Author) Other; Klironomos, FD (Author) Other; W Tsai (Author) Other; Santos, JR (Author) Other; Lopes M B L dos Santos (Author) FCUP; Castro Neto, AH (Author) Other

Journal

Title: Europhysics Letters

Vol. 80

Final page: 67007

ISSN: 0295-5075

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 66 Citations

Scopus - 59 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-004-D1C

DOI: 10.1209/0295-5075/80/67007

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6