Spintronic Properties of Zigzag-Edged Triangular Graphene Flakes

摘要: We investigate quantum transport properties of triangular graphene flakes with zigzag edges by using first principles calculations. Triangular have large magnetic moments which vary the number hydrogen atoms terminating its edge and scale size. Electronic transmission current-voltage characteristics these flakes, when contacted metallic electrodes, reveal spin valve remarkable rectification features. The transition from ferromagnetic to antiferromagnetic state under bias voltage can, however, terminate polarizing effects for specific flakes. Geometry size dependent may be crucial spintronic nanodevice applications.