Electric field effect in ultrathin zigzag graphene nanoribbons*
Zhang Wen-Xing†, Liu Yun-Xiao‡, Tian Hua, Xu Jun-Wei, Feng Lin
       
Band structures of 4ZGNR under increasing applied fields. Bottom panels are enlarged views of the upper panels around E F. For spins, α and β are displayed in red and blue, respectively. Five electric fields of (a) 0 V/Å, (b) 0.200 V/Å, (c) 0.380 V/Å, (d) 0.400 V/Å, and (e) 0.420 V/Å are applied.