Spin helix of magnetic impurities in two-dimensional helical metal

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	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
	Spin helix of magnetic impurities in two-dimensional helical metal
发表期刊	EPL
关键词	Single Dirac Cone Topological-insulator Surface Bi2te3
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
	2010
ISSN	0295-5075
卷号	90 期号:4 页码:-
学科领域	Physics
收录类别	SCI
项目资助者	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]
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	理论物理所科研产出_SCI论文
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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