Abstract
A planar quantum-well device made of a gapless graphene nanoribbon with edges in contact with gapped graphene sheets is examined. The size-quantization spectrum of charge carriers in an asymmetric quantum well is shown to exhibit a pseudospin splitting. Interface states of a new type arise from the crossing of dispersion curves of gapless and gapped graphene materials. The exciton spectrum is calculated for a planar graphene quantum well. The effect of an external electric field on the exciton spectrum is analyzed.
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Original Russian Text © P.V. Ratnikov, A.P. Silin, 2012, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2012, Vol. 141, No. 3, pp. 582–601.
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Ratnikov, P.V., Silin, A.P. Size quantization in planar graphene-based heterostructures: Pseudospin splitting, interface states, and excitons. J. Exp. Theor. Phys. 114, 512–528 (2012). https://doi.org/10.1134/S1063776112020094
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DOI: https://doi.org/10.1134/S1063776112020094