ITP OpenIR  > SCI期刊论文
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
Source PublicationEPL
KeywordSingle Dirac Cone Topological-insulator Surface Bi2te3
AbstractThe 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
ISSN0295-5075
Volume90Issue:4Pages:-
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNSFC[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]
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Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5109
CollectionSCI期刊论文
Corresponding AuthorYe, F , Chinese Acad Sci, Grad Univ, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China
Recommended Citation
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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