Interior Gap Superfluidity

Details Interior Gap Superfluidity Interior Gap Superfluidity

2002-08-02

arxiv.org/abs/cond-mat/0208052v1

Phys.Rev.Lett. 90 (2003) 047002

Physics

Condensed Matter

Superconductivity

5 pages

Scientific paper

10.1103/PhysRevLett.90.047002

We propose a new state of matter in which the pairing interactions carve out a gap within the interior of a large Fermi ball, while the exterior surface remains gapless. This defines a system which contains both a superfluid and a normal Fermi liquid simultaneously, with both gapped and gapless quasiparticle excitations. This state can be realized at weak coupling. We predict that a cold mixture of two species of fermionic atoms with different mass will exhibit this state. For electrons in appropriate solids, it would define a material that is simultaneously superconducting and metallic.

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