Electron waves in chemically substituted graphene
Materials Science
2009-11-13 v1 Strongly Correlated Electrons
Abstract
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.
Keywords
Cite
@article{arxiv.0705.3040,
title = {Electron waves in chemically substituted graphene},
author = {N. M. R. Peres and F. D. Klironomos and S. -W. Tsai and J. R. Santos and J. M. B. Lopes dos Santos and A. H. Castro Neto},
journal= {arXiv preprint arXiv:0705.3040},
year = {2009}
}