Spin gapless armchair graphene nanoribbons under magnetic field and uniaxial strain

Using Green＇s function method, we investigate the spin transport properties of armchair graphene nanoribbons （AG- NRs） 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 ap...

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Bibliographic Details
Published inChinese physics B Vol. 22; no. 8; pp. 596 - 600
Main Author 侯海平 谢月娥 陈元平 欧阳滔 葛青霞 钟建新
Format Journal Article
LanguageEnglish
Published 01.08.2013
Subjects
Chairs
Displays
Graphene
Magnetic fields
Nanostructure
Semiconductors
Strain
Transforms
Transport properties
单轴
应变
扶手
无间隙
石墨
磁场
纳米带
自旋
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/8/087303

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Summary:Using Green＇s function method, we investigate the spin transport properties of armchair graphene nanoribbons （AG- NRs） 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 be- tween 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.
Bibliography:Hou Hai-Ping, Xie Yue-E, Chen Yuan-Ping, Ouyang Tao, Ge Qing-Xiaa）b）, and Zhong Jian-Xin a）Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Xiangtan University, Xiangtan 411105, China b） Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Xiangtan 411105, China
graphene, spin gapless, spin transport, tight-binding
Using Green＇s function method, we investigate the spin transport properties of armchair graphene nanoribbons （AG- NRs） 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 be- tween 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.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/8/087303