Year: 2017
Type: article
Abstract: Fulde-Ferrell (FF) Larkin-Ovchinnikov (LO) phases were proposed for superconductors or superfluids in a strong magnetic field. With the experimental progress in ultracold atomic systems, topological FFLO phases have also been put forward since it is a natural consequence of realizable spin-orbital coupling (SOC). In this paper, we theoretically investigate a triangular lattice model with SOC and an in-plane field. By constructing the phase diagram, we show that it produces gapped and gapless topological FF phases with Chern numbers $C=\ifmmode\pm\else\textpm\fi{}1,\phantom{\rule{0.28em}{0ex}}\ifmmode\pm\else\textpm\fi{}2,\phantom{\rule{0.28em}{0ex}}\ensuremath{-}3$, and $\ensuremath{-}4$. We get the phase boundaries by the change in the sign of the Pfaffian. The chiral edge states for different topological FF phases also are elucidated.
Source: Physical Review A
Authors: Long-Fei Guo, Peng Li, Su Yi
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2574290485