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Eccentricity effects on the quantum confinement in double quantum rings
J. Costa e Silva, Andrey Chaves, G. A. Farias +2
This work presents a theoretical study of the energy spectrum of GaAs/AlGaAs concentric double quantum rings, under an applied magnetic field directed perpendicular to the ring pla…
Braess paradox at the mesoscopic scale
A. A. Sousa, Andrey Chaves, G. A. Farias +1
We theoretically demonstrate that the transport inefficiency recently found experimentally for branched-out mesoscopic networks can also be observed in a quantum ring of finite wid…
Magnetic field induced shell-to-core confinement transition in type-II semiconductor quantum wires
R. Macêdo, J. Costa e Silva, Andrey Chaves +2
We investigate the excitonic properties of a core-multishell semiconductor nanowire with type-II band mismatch, i.e. with spatially separated electrons and holes, under an external…
Optical conductivity of curved graphene
A. J. Chaves, T. Frederico, O. Oliveira +2
We compute the optical conductivity for an out-of-plane deformation in graphene using an approach based on solutions of the Dirac equation in curved space. Different examples of pe…