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Collective modes in a Dirac insulator with short range interactions
Luo, X; Yu, Y; Liang, L; 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.
2015
发表期刊PHYSICAL REVIEW B
卷号91期号:12页码:125126
文章类型Article
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.
学科领域Physics
资助者973 program of MOST of China [2012CB821402] ; 973 program of MOST of China [2012CB821402] ; NNSF of China [11174298, 11121403, 11474061] ; NNSF of China [11174298, 11121403, 11474061] ; 973 program of MOST of China [2012CB821402] ; 973 program of MOST of China [2012CB821402] ; NNSF of China [11174298, 11121403, 11474061] ; NNSF of China [11174298, 11121403, 11474061]
DOIhttp://dx.doi.org/10.1103/PhysRevB.91.125126
关键词[WOS]LATTICE GAUGE-THEORIES ; TOPOLOGICAL INSULATORS ; FIELD THEORY ; GRAPHENE ; REALIZATION ; SIMULATION
收录类别SCI
语种英语
资助者973 program of MOST of China [2012CB821402] ; 973 program of MOST of China [2012CB821402] ; NNSF of China [11174298, 11121403, 11474061] ; NNSF of China [11174298, 11121403, 11474061] ; 973 program of MOST of China [2012CB821402] ; 973 program of MOST of China [2012CB821402] ; NNSF of China [11174298, 11121403, 11474061] ; NNSF of China [11174298, 11121403, 11474061]
WOS类目Physics, Condensed Matter
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21055
专题理论物理所2015年知识产出
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.
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Luo, X,Yu, Y,Liang, L,et al. Collective modes in a Dirac insulator with short range interactions[J]. PHYSICAL REVIEW B,2015,91(12):125126.
APA Luo, X,Yu, Y,Liang, L,&Luo, X .(2015).Collective modes in a Dirac insulator with short range interactions.PHYSICAL REVIEW B,91(12),125126.
MLA Luo, X,et al."Collective modes in a Dirac insulator with short range interactions".PHYSICAL REVIEW B 91.12(2015):125126.
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