Nitrogen-induced local spin polarization in graphene on cobalt

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:342

Article

Chen, Zhongping^1,2  Miao, Ling¹  Miao, Xiangshui^1,3 

[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

[2] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[3] Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

关键词: Spintronics;    Graphene;    Doping;    First principle;   

DOI  :  10.1016/j.jmmm.2013.04.005

来源: Elsevier

【 摘 要 】

Using first principles calculations, we demonstrate an effective method to tailor the local spin configuration of graphene on Co(0 0 0 1) surface through nitrogen doping. Two different site occupancies of the N impurities are discussed with the focus on structural, electronic and magnetic properties. N induces opposite local spin polarization at the two sites through pi-d Zener exchange-type hybridization with Co substrate. In addition, the induced spin polarization is energy dependent and controllable by electric field. Consequently, this structure can be applied as a spin injection source in graphene based spintronics. (c) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

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