Topological States with Broken Translational and Time-Reversal Symmetries in a Honeycomb-Triangular Lattice

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We study fermions in a lattice, with on-site and nearest neighbor attractive interactions between two spin species. We consider two geometries: (1) both spins in a triangular lattice and (2) a mixed geometry with up spins in honeycomb and down spins in triangular lattices. We focus on the interplay between spin-population imbalance, on-site and valence bond pairing, and order parameter symmetry. The mixed geometry leads to a rich phase diagram of topologically nontrivial phases. In both geometries, we predict order parameters with simultaneous time-reversal and translational symmetry breaking.


Original languageEnglish
Article number063605
Pages (from-to)1-8
Number of pages8
JournalPhysical Review A
Issue number6
Publication statusPublished - Jun 2015
MoE publication typeA1 Journal article-refereed

    Research areas

  • superfluidity, symmetry breaking, ultracold Fermi gases

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