Coexistence of density wave and superfluid order in a dipolar Fermi gas

Abstract

We analyse the coexistence of superfluid and density wave (stripe) order in a quasi-two-dimensional gas of dipolar fermions aligned by an external field. Remarkably, the anisotropic nature of the dipolar interaction allows for such a coexistence in a large region of the zero temperature phase diagram. In this region, the repulsive part of the interaction drives the stripe formation and the attractive part induces the pairing, resulting in a supersolid with $p$-wave Cooper pairs aligned along the stripes. From a momentum space perspective, the stability of the supersolid phase is due to the fact that the stripe order renders the Fermi surface only partially gapped, leaving gapless regions that are most important for $p$-wave pairing. We finally demonstrate how this supersolid phase can be detected in time-of-flight experiments.

arXiv comment8 pages, 7 figures

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Cited by in corpus (11)

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• Superfluidity of a dipolar Fermi gas in 2D optical lattices bilayer
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• Bound states and Cooper pairs of molecules in 2D optical lattices bilayer
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• Interplay of interlayer pairing and many-body screening in a bilayer of dipolar fermions
• Dipolar fermions in a multilayer geometry
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• Triplet Superfluidity on a triangular ladder with dipolar fermions
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