Spontaneous loop-spin current with topological characters in the Hubbard model

Shimpei Goto*, Keisuke Masuda, Susumu Kurihara

*この研究の対応する著者

    研究成果査読

    2 被引用数 (Scopus)

    抄録

    We find a state characterized by a spontaneous loop-spin current and a single-particle gap in the Hubbard model within the variational cluster approach. This state exists for arbitrarily small interaction in a half-filled honeycomb lattice. Moreover, from the calculations of the topological invariants for the interacting system, it is shown that this gapped state has nontrivial topological characters; this state is the topological Mott insulating state. This result implies the ubiquity of topological Mott insulating phases.

    本文言語English
    論文番号075102
    ジャーナルPhysical Review B - Condensed Matter and Materials Physics
    90
    7
    DOI
    出版ステータスPublished - 2014 8 4

    ASJC Scopus subject areas

    • 凝縮系物理学
    • 電子材料、光学材料、および磁性材料

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