Propriedades de transporte em nanofita de grafeno

Abstract

Graphene, an allotrope from carbon of atomic thickness, whose lattice is hexagonal, has become in the last years a material quite exploited both in theoretical and experimental studies, thanks to pioneering works by British researchers in 2004. Taking finite-sized structures from graphene cuts, one can obtain the so-called graphene nanoribbons (GNRs) whose properties may vary depending on the type of edge and the width of these structures. In this context, the present work has the theoretical study of the transport properties in graphene nanoribbons. Thus, this study gains form through bibliographic research, being necessary to do so, the explanation of the basic properties of carbon and its hybridization processes. Considering the nanometric dimensions of graphene, it became necessary to use quantum mechanics to define some of its properties and some possible applications. We used a free package Python programming language, called Kwant, to construct nanometric structures and to obtain dispersion and conductance relation for graphene nanoribbons with different widths and edges. The results obtained are consistent with those reported in the literature, where we verified that the properties of conduction in nanoribbons depend on its dimensions and types of edge.