Electron waves in chemically substituted graphene
- Author(s): Peres, NMR
- Klironomos, FD
- Tsai, SW
- Santos, JR
- Lopes Dos Santos, JMB
- Castro Neto, AH
- et al.
Published Web Locationhttps://doi.org/10.1209/0295-5075/80/67007
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. © Europhysics Letters Association.
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