Spin-Dependent Band Structure of Zigzag Graphene Nanoribbon with a Vacancy

By using Tight-binding and hubard model combining with Green's function techniques, we investigate the spin effect on band structures of zigzag graphene nanoribbons(ZGNR) with a vacancy defect. The spin density of the graphene ribbons corresponding to different vacancy locations is calculated. It is found that the existence of a vacancy causes magnetization in graphene structure and we can see a significant change in the electronic band gap and sharp changes in the spin density around defect position.

کلیدواژه ها:

component: Spin Effect ، Vacancy Defect ، Zigzag Graphene Nanoribbon ، Band Structure