The Electronic Properties Of The Graphene Nanoribbons With Heterojunction

Due to its strictly two-dimensional structure and hexagonal symmetry, graphemeis of very excellent electronic properties, and thus become an ideal material of greatpotential in the field of microelectronic device fabrication and its prospect will beincalculable. We can make the infinite graphene into a banded system to get variousshapes graphene nanoribbons. The geometry of graphene nanoribbons determines itselectronic properties.This article will apply the non-equilibrium Green’s function theory to study theelectronic transport properties of several typical shapes of graphene nanoribbons withheterojunction. The results show when both sides of the width and the middle of thewidth difference is constant with the increase in the middle of the width the zigzaggraphene nanoribbons with heterojunction will gradually change from thesemiconductor to the conductor while the armchair graphene nanoribbons withheterojunction is always the semiconductor.