Spin gapless armchair graphene nanoribbons under magnetic field and uniaxial strain

doi:10.1088/1674-1056/22/8/087303

Abstract 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.

Keywords: graphene spin gapless spin transport tight-binding

Received: 05 November 2012
Revised: 29 January 2013
Accepted manuscript online:

PACS:	73.63.-b	(Electronic transport in nanoscale materials and structures)
	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
	85.35.-p	(Nanoelectronic devices)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB921303), the National Natural Science Foundation of China (Grant Nos. 51172191, 11074211, 11074213, 51006086, and 51176161), and the Joint Funds of the Natural Science Foundation of Hunan Province, China (Grant No. 10JJ9001).

Corresponding Authors: Xie Yue-E, Zhong Jian-Xin
E-mail: xieyech@xtu.edu.cn; jxzhong@xtu.edu.cn

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Hou Hai-Ping (侯海平), Xie Yue-E (谢月娥), Chen Yuan-Ping (陈元平), Ouyang Tao (欧阳滔), Ge Qing-Xia (葛青霞), Zhong Jian-Xin (钟建新) Spin gapless armchair graphene nanoribbons under magnetic field and uniaxial strain 2013 Chin. Phys. B 22 087303

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Spin gapless armchair graphene nanoribbons under magnetic field and uniaxial strain

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