Journal
PHYSICAL REVIEW B
Volume 79, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.155430
Keywords
electric potential; electron spin polarisation; electronic structure; graphene; impurity states; photoemission; potential energy functions; quantum electrodynamics
Funding
- National Natural Science Foundation of China [10574119]
- National Key Basic Research Program [2006CB922000]
- CERG [602506, 602507]
- Natural Sciences and Engineering Research Council of Canada [245680]
- National Institute of Nanotechnology, Canada
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In this paper, we numerically study bound electron states induced by long-range Coulomb impurities in gapped graphene and quasibound states in the supercritical region based on the lattice model. We present a detailed comparison between our numerical calculations and the prediction of quantum electrodynamics 2+1(QED) continuum model. Furthermore, the supercritical charge has been determined by both the lattice model and the continuum model. The numerical results show that the behavior of quasibound state is consistent with the prediction using Fano's formalism.
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