Size Quantization in Planar Graphene-Based Heterostructures: Pseudospin Splitting, Interface States, and Excitons
arXiv:1208.1464 · doi:10.1134/S1063776112020094
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.
15 pages, 14 figures
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Cited by in corpus (11)
- Bielectron vortices in two-dimensional Dirac semimetals
- Graphene superlattice with periodically modulated Dirac gap
- Lateral heterostructures and one-dimensional interfaces in 2D transition metal dichalcogenides
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