Spin helix of magnetic impurities in two-dimensional helical metal

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	Spin helix of magnetic impurities in two-dimensional helical metal
	Ye, F.; Ding, G. H.; Zhai, H.; Su, Z. B.; Ye, F , Chinese Acad Sci, Grad Univ, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China
	2010
发表期刊	EPL
ISSN	0295-5075
卷号	90 期号:4 页码:-
摘要	The surface state of a topological insulator dubbed as helical metal is a unique metallic system, which exhibits one single Dirac cone and spin-momentum locking. We show that the behaviors of magnetic impurities embedded in this kind of surface states manifest the uniqueness of helical metals among other conventional Dirac materials such as graphene. We find there is a significant Dzyaloshinskii-Moriya (DM) term among the effective interactions between impurity spins mediated by the conduction electrons. For a chain of impurity spins, we show that such a DM interaction gives rise to a single-handed spin helix state, the handedness of which is locked with the sign of the Fermi velocity of the emergent Dirac fermions. We also point out that the polarization of impurity spins can be controlled via electric voltage for dilute magnetic-impurity concentration. Copyright (C) EPLA, 2010
部门归属	[Ye, F] Chinese Acad Sci, Grad Univ, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China; [Ye, F; Zhai, H] Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China; [Ding, GH] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China; [Su, ZB] Chinese Acad Sci, Inst Theoret Phys, Beijing 100089, Peoples R China
关键词	Single Dirac Cone Topological-insulator Surface Bi2te3
学科领域	Physics
资助者	NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002] ; NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002] ; NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002] ; NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002]
URL	查看原文
收录类别	SCI
资助者	NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002] ; NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002] ; NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002] ; NSFC[10904081]; Tsinghua University, NSFC[10944002, 10847002]
WOS记录号	WOS:000279119200023
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/5109
专题	理论物理所1978-2010年知识产出
通讯作者	Ye, F , Chinese Acad Sci, Grad Univ, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ye, F.,Ding, G. H.,Zhai, H.,et al. Spin helix of magnetic impurities in two-dimensional helical metal[J]. EPL,2010,90(4):-.
APA	Ye, F.,Ding, G. H.,Zhai, H.,Su, Z. B.,&Ye, F , Chinese Acad Sci, Grad Univ, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China.(2010).Spin helix of magnetic impurities in two-dimensional helical metal.EPL,90(4),-.
MLA	Ye, F.,et al."Spin helix of magnetic impurities in two-dimensional helical metal".EPL 90.4(2010):-.

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