Topological Triply Degenerate Points Induced by Spin-Tensor- Momentum Couplings

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dc.contributor.ISNI0000 0000 3722 2361 (Zhang, C)
dc.contributor.ORCID0000-0003-4623-4200 (Zhang, F)
dc.contributor.VIAF4042455 (Zhang, C)
dc.contributor.authorHu, Haiping
dc.contributor.authorHou, Junpeng
dc.contributor.authorZhang, Fan
dc.contributor.authorZhang, Chuanwei
dc.contributor.utdAuthorHu, Haiping
dc.contributor.utdAuthorHou, Junpeng
dc.contributor.utdAuthorZhang, Fan
dc.contributor.utdAuthorZhang, Chuanwei
dc.date.accessioned2019-05-03T19:59:19Z
dc.date.available2019-05-03T19:59:19Z
dc.date.created2018-06-12
dc.descriptionIncludes supplementary material
dc.description.abstractThe recent discovery of triply degenerate points (TDPs) in topological materials has opened a new perspective toward the realization of novel quasiparticles without counterparts in quantum field theory. The emergence of such protected nodes is often attributed to spin-vector-momentum couplings. We show that the interplay between spin-tensor-and spin-vector-momentum couplings can induce three types of TDPs, classified by different monopole charges (C = ± 2, ± 1, 0). A Zeeman field can lift them into Weyl points with distinct numbers and charges. Different TDPs of the same type are connected by intriguing Fermi arcs at surfaces, and transitions between different types are accompanied by level crossings along high-symmetry lines. We further propose an experimental scheme to realize such TDPs in cold-atom optical lattices. Our results provide a framework for studying spin-tensor-momentum coupling-induced TDPs and other exotic quasiparticles.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.sponsorshipThis work is supported by the National Science Foundation (NSF) (Grant No. PHY-1505496), Army Research Office (ARO) (Grant No. W911NF-17-1-0128), Air Force Office of Scientific Research (AFOSR) (Grant No. FA9550-16-1-0387).
dc.identifier.bibliographicCitationHu, Haiping, Junpeng Hou, Fan Zhang, and Chuanwei Zhang. 2018. "Topological Triply Degenerate Points Induced by Spin-Tensor- Momentum Couplings." Physical Review Letters 120(24): 240401:1-6, doi:10.1103/PhysRevLett.120.240401
dc.identifier.issn0031-9007
dc.identifier.issue24
dc.identifier.urihttps://hdl.handle.net/10735.1/6446
dc.identifier.volume120
dc.language.isoen
dc.publisherAmer Physical Soc
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.120.240401
dc.rights©2018 American Physical Society
dc.source.journalPhysical Review Letters
dc.subjectSemimetal
dc.subjectQuasiparticles (Physics)
dc.subjectQuantum field theory
dc.subjectOptical lattices
dc.titleTopological Triply Degenerate Points Induced by Spin-Tensor- Momentum Couplings
dc.type.genrearticle

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