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Bound states in disclinated graphene with Coulomb impurities in the presence of a uniform magnetic field
Affiliation:1. Departamento de Física, CCEN, Universidade Federal da Paraíba, Cidade Universitária, 58051-970 João Pessoa, PB, Brazil;2. Departamento de Física, Universidade Estadual de Feira de Santana, Novo Horizonte, 44036-900 Feira de Santana, BA, Brazil
Abstract:In this contribution, we study the effects caused by an impurity on the quantum dynamics of massive excitations in a disclinated graphene in the presence of an external magnetic field. Within a continuum approach, the problem is mathematically modeled by the definition of a special vector potential containing all the information about the topology and the interacting fields. The presence of disclination is introduced by a term in the Dirac equation that translates the appearance of a phase associated with the transport of the spinor around the apex of the cone. We solve exactly the Dirac equation for this problem and the eigenvalues are obtained. We observe the influence of the disclination on the spectrum of energy and the allowed values of magnetic field.
Keywords:Coulomb Impurity  Gapped Graphene  Massive Dirac excitation  Topological defect
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