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题名: Collective modes in a Dirac insulator with short range interactions
作者: Luo, X;  Yu, Y;  Liang, L
刊名: PHYSICAL REVIEW B
出版日期: 2015
卷号: 91, 期号:12, 页码:125126
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevB.91.125126
通讯作者: Luo, X (reprint author), Fudan Univ, Dept Phys, State Key Lab Surface Phys & Collaborat Innovat, Ctr Field Theory & Particle Phys,Ctr Adv Microstr, Shanghai 200433, Peoples R China.
文章类型: Article
英文摘要: We study a Haldane model with nearest neighbor interactions. We find one-dimensional-like collective modes arising due to the interplay of pseudospin and valley degrees of freedom. In the large-band-gap or moderate interaction limit, these excitations are low energy modes lying in the band gap. The dispersion relations are qualitatively different in the trivial insulator phase and Chern insulator phase, thus can be used to identify the topology of the Haldane model with the bulk property. We also discuss how to detect these modes in cold atom systems. An Abelian gauge theory will emerge when a physical current-current interaction is introduced into the Haldane model or the Kane-Mele model.
类目[WOS]: Physics, Condensed Matter
关键词[WOS]: LATTICE GAUGE-THEORIES ;  TOPOLOGICAL INSULATORS ;  FIELD THEORY ;  GRAPHENE ;  REALIZATION ;  SIMULATION
收录类别: SCI
项目资助者: 973 program of MOST of China [2012CB821402] ;  NNSF of China [11174298, 11121403, 11474061]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21055
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Luo, X,Yu, Y,Liang, L. Collective modes in a Dirac insulator with short range interactions[J]. PHYSICAL REVIEW B,2015,91(12):125126.
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