Electric field effect in ultrathin zigzag graphene nanoribbons*
Zhang Wen-Xing†, Liu Yun-Xiao‡, Tian Hua, Xu Jun-Wei, Feng Lin
       
Optimized atomic structures of (a) 3ZGNR and (b) 4ZGNR. One unit cell is shown between two parallel slashed lines, and the lattice constant is a . The applied electric field is along the x axis. Black balls are carbon and white ones are hydrogen.