Supersolid Bose-Fermi Mixtures in Optical Lattices

Details Supersolid Bose-Fermi Mixtures in Optical Lattices Supersolid Bose-Fermi Mixtures in Optical Lattices

2007-08-24

arxiv.org/abs/0708.3241v3

Phys. Rev. Lett. 100, 100401 (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 5 pictures, Published version

Scientific paper

10.1103/PhysRevLett.100.100401

We study a mixture of strongly interacting bosons and spinless fermions with on-site repulsion in a three-dimensional optical lattice. For this purpose we develop and apply a generalized DMFT scheme, which is exact in infinite dimensions and reliably describes the full range from weak to strong coupling. We restrict ourselves to half filling. For weak Bose-Fermi repulsion a supersolid forms, in which bosonic superfluidity coexists with charge-density wave order. For stronger interspecies repulsion the bosons become localized while the charge density wave order persists. The system is unstable against phase separation for weak repulsion among the bosons.

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