Density Of States And Current Distribution In Rippled Graphene Hetero-junction

Graphene is an ideal two-dimensional crystal. It has many excellent properties,especially, it is very easy to be rippled. When a grapheme is rippled, its density ofstates and conductivity will be changed. This ripple can generate a pseudo-magneticfield, and cause the current distribution to become a vortical flow. This article willmainly discuss the local density of states, conductivity and current distribution inrippled graghene hetero-junctions.This paper includes three chapters:The first chapter is a brief introduction of the background of graphene.The second chapter, introduces the major theoretical method adopted in thispaper, including the tight-binding model of the graghene, non-equilibrium Green’sfunction theory.The third chapter discusses the density of states, conductivity and currentdistributions in a rippled hetero-junction of graphene with a kink of60degrees.