Nanostructured graphene.

Study of energy levels in graphene nanostructures. The confined states in three different graphene systems were considered: 1) monolayer-bilayer graphene quantum dots (QDs), 2) trilayer graphene QDs, and 3) hybrid monolayer-bilayer interfaces. As a new project, we investigate the existence of confined massless fermion states in a graphene quantum well by means of analytical and numerical calculations. Our proposal is based on the fact that the transmission coefficient through both barriers and wells in graphene displays a strong angular dependence. The trigonal warping effect can suppress this tunneling and thus allow the confinement of electrons. We also propose to calculate electrical conductivity along the quantum well direction. We will investigate if there is any dependence of the electrical conductivity on the specific direction of the quantum well with respect to the graphene lattice. The idea is that this would lead to the realization of a novel type of graphene wire where conduction is not influenced by the boundaries. The aim of our project is to guide experimental research towards confinement of carriers in graphene nanostructures.

Keywords:GRAPHENE, ELECTRONIC STRUCTURE, QUANTUM DOTS, NANOPHYSICS

Disciplines:Condensed matter physics and nanophysics

Project type:Collaboration project