期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.115302
关键词
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资金
- Australian Research Council (ARC) [FT130100815, FT140100003, DP140103231, DP140100637]
- NKBRSFC-China [2011CB921502, 2011CB921602]
- NSFC-China [11025421, 11228410, 11175094, 91221205]
- Australian Research Council [FT130100815] Funding Source: Australian Research Council
Topological superfluids usually refer to a superfluid state which is gapped in the bulk but metallic at the boundary. Here we report that a gapless, topologically nontrivial superfluid with an inhomogeneous Fulde-Ferrell pairing order parameter can emerge in a two-dimensional spin-orbit coupled Fermi gas, in the presence of both in-plane and out-of-plane Zeeman fields. The Fulde-Ferrell pairing-induced by the spin-orbit coupling and in-plane Zeeman field-is responsible for this gapless feature. This exotic superfluid has a significant Berezinskii-Kosterlitz-Thouless transition temperature and has robust Majorana edge modes against disorder owing to its topological nature.
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