Work

Electron waves in chemically substituted graphene

Year: 2007

Type: article

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.

Source: Europhysics Letters (EPL)

DOI: 10.1209/0295-5075/80/67007

Authors: N. M. R. Peres, F. D. Klironomos, S.-W. Tsai, J. R. Santos, J. M. B. Lopes dos Santos, A. H. Castro Neto

Institutions: University of Minho, University of California, Riverside, Universidade do Porto, Boston University

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, University of California, Santa Barbara, Division of Materials Research, Kavli Institute for Theoretical Physics, University of California, Santa Barbara

Awards: Kavli Institute for Theoretical Physics, G5905734738, Disordered Critical Quantum Magnetic Systems