Wednesday, August 8, 2012

1208.1464 (P. V. Ratnikov et al.)

Size Quantization in Planar Graphene-Based Heterostructures: Pseudospin
Splitting, Interface States, and Excitons

P. V. Ratnikov, A. P. Silin
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.
View original:

No comments:

Post a Comment