中国物理B ›› 2013, Vol. 22 ›› Issue (8): 87303-087303.doi: 10.1088/1674-1056/22/8/087303
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
侯海平a b, 谢月娥a b, 陈元平a b, 欧阳滔a b, 葛青霞a b, 钟建新a b
Hou Hai-Ping (侯海平)a b, Xie Yue-E (谢月娥)a b, Chen Yuan-Ping (陈元平)a b, Ouyang Tao (欧阳滔)a b, Ge Qing-Xia (葛青霞)a b, Zhong Jian-Xin (钟建新)a b
摘要: Using Green's function method, we investigate the spin transport properties of armchair graphene nanoribbons (AGNRs) under magnetic field and uniaxial strain. Our results show that it is very difficult to transform narrow AGNRs directly from semiconductor to spin gapless semiconductors (SGS) by applying magnetic fields. However, as a uniaxial strain is exerted on the nanoribbons, the AGNRs can transform to SGS by a small magnetic field. The combination mode between magnetic field and uniaxial strain displays a nonmonotonic arch-pattern relationship. In addition, we find that the combination mode is associated with the widths of nanoribbons, which exhibits group behaviors.
中图分类号: (Electronic transport in nanoscale materials and structures)