Edge passivation control of graphene nanoribbons for robust pure spin current generation with photogalvanic effect

doi:10.1016/j.carbon.2020.07.046

	Edge passivation control of graphene nanoribbons for robust pure spin current generation with photogalvanic effect
	Zhou, Yanhong 1; Yu, Shaohui 2; Zheng, Xiaohong 1,3,4
刊名	CARBON
	2020-12-01
卷号	170
关键词	Pure spin current Photogalvanic effect Graphene nanoribbons Spatial inversion symmetry
ISSN号	0008-6223
DOI	10.1016/j.carbon.2020.07.046
通讯作者	Zheng, Xiaohong(xhzheng@theory.issp.ac.cn)
英文摘要	Photogalvanic effect has been demonstrated to induce pure spin current in several spin polarized systems, but limited to specific photon energy or specific polarization/helicity angles of the incident light in any of the reported systems. The requirement of such a precise tuning to the specific photon energy or polarization/helicity angles makes it extremely difficult to achieve pure spin current practically. In this work, we propose a realization scheme with zigzag-edged graphene nanoribbons (ZGNRs) by edge passivation control. In detail, we divide a ZGNR into two halves, with one half monohydrogenated at the upper edge and dihydrogenerated at the lower edge, while the other half hydrogenated oppositely. By extensive first principles calculations, we show that pure spin current can always be generated, neither dependent of the photon energy and polarization/helicit angle, nor dependent of whether it is linearly, circularly or elliptically polarized. Such a robustness in pure spin current generation is found to originate from the inversion symmetry in the geometry structure and the spin semiconducting feature of the ZGNRs. This suggests a fantastic scheme for practically generating pure spin current with photogalvanic effect in graphene and will be of great significance in spintronics. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[11974355] ; National Natural Science Foundation of China[11804093] ; National Natural Science Foundation of China[61764005]
WOS关键词	MAGNETORESISTANCE
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000579779800035
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/104648]
专题	中国科学院合肥物质科学研究院
通讯作者	Zheng, Xiaohong
作者单位	1.East China Jiao Tong Univ, Coll Sci, Nanchang 330013, Jiangxi, Peoples R China 2.Hefei Normal Univ, Sch Math & Stat, Hefei 230061, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China 4.Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Inst Laser Spect, Taiyuan 030006, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Yanhong,Yu, Shaohui,Zheng, Xiaohong. Edge passivation control of graphene nanoribbons for robust pure spin current generation with photogalvanic effect[J]. CARBON,2020,170.
APA	Zhou, Yanhong,Yu, Shaohui,&Zheng, Xiaohong.(2020).Edge passivation control of graphene nanoribbons for robust pure spin current generation with photogalvanic effect.CARBON,170.
MLA	Zhou, Yanhong,et al."Edge passivation control of graphene nanoribbons for robust pure spin current generation with photogalvanic effect".CARBON 170(2020).