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

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2015-06
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
1-8
Series
Physical Review A, Volume 91, issue 6
Abstract
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.
Description
| openaire: EC/FP7/340748/EU//CODE
Keywords
superfluidity, symmetry breaking, ultracold Fermi gases
Other note
Citation
Sarjonen , R & Törmä , P 2015 , ' Topological States with Broken Translational and Time-Reversal Symmetries in a Honeycomb-Triangular Lattice ' , Physical Review A , vol. 91 , no. 6 , 063605 , pp. 1-8 . https://doi.org/10.1103/PhysRevA.91.063605