Scattering theory and ground-state energy of Dirac fermions in graphene with two Coulomb impurities
نویسندگان
چکیده
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. PACS. 72.80.Vp Electronic transport in graphene – 73.22.Pr Electronic structure of graphene
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تاریخ انتشار 2017