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arXiv · 1406.5770

Scattering theory and ground-state energy of Dirac fermions in graphene with two Coulomb impurities

D. Klöpfer·A. De Martino·D. Matrasulov·R. Egger
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Abstract

We study the physics of Dirac fermions in a gapped graphene monolayer containing two Coulomb impurities. For the case of equal impurity charges, we discuss the ground-state energy using the linear combination of atomic orbitals (LCAO) approach. For opposite charges of the Coulomb centers, an electric dipole potential results at large distances. We provide a nonperturbative analysis of the corresponding low-energy scattering problem.

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D. Klöpfer, A. De Martino, D. Matrasulov, R. Egger. 2014-06-22. Scattering theory and ground-state energy of Dirac fermions in graphene with two Coulomb impurities. https://doi.org/10.1140/epjb%2Fe2014-50414-8

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