Propriedades eletrônicas de super-redes de grafeno com uma modulação da velocidade de Fermi

Abstract

Graphene is considered to be one of the most promising nanomaterials of the century., its peculiar characteristics have motivated the research around its use and the study of its electronic properties for the most diverse purposes. Graphene superlattices have attracted great research interest in the last years, since it is possible to manipulate the electronic properties of graphene in these structures. They can be periodic, quasi-periodic or disordered, each one presenting different electronic properties. In this work we investigate the possibility of transforming a periodic and quasi-periodic graphene superlattice one into another by a Fermi velocity modulation. We analyzed finite and infinite superlattices. We considered an one-dimensional superlattice and show that the transformation can be perfectly done for charge carriers moving in the direction of the superlattice. However, for oblique moving, some features can not be transformed by the Fermi velocity. The results obtained here are relevant for the development of novel graphene-based electronic devices.