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

Klöpfer, D., De Martino, A., Matrasulov, D. & Egger, R. (2014). Scattering theory and ground-state energy of Dirac fermions in graphene with two Coulomb impurities. European Physical Journal B: Condensed Matter and Complex Systems, 87(8), 187 - ?. doi: 10.1140/epjb/e2014-50414-8

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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.

Item Type: Article
Additional Information: The final publication is available at Springer via http://dx.doi.org/10.1140/epjb/e2014-50414-8
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: School of Engineering & Mathematical Sciences > Department of Mathematical Science
Related URLs:
URI: http://openaccess.city.ac.uk/id/eprint/4426

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