Supersolid Phase of Cold Fermionic Polar Molecules in 2D Optical Lattices

Details Supersolid Phase of Cold Fermionic Polar Molecules in 2D Optical Lattices Supersolid Phase of Cold Fermionic Polar Molecules in 2D Optical Lattices

2011-01-28

arxiv.org/abs/1101.5633v2

Phys. Rev. A 83, 053629 (2011)

Physics

Condensed Matter

Quantum Gases

8 pages, 5 figures

Scientific paper

We study a system of ultra-cold fermionic polar molecules in a two-dimensional square lattice interacting via both the long-ranged dipole-dipole interaction and a short-ranged on-site attractive interaction. Singlet superfluid, charge density wave, and supersolid phases are found to exist in the system. We map out the zero temperature phase diagram and find that the supersolid phase is considerably stabilized by the dipole-dipole interaction and thus can exist over a large region of filling factors. We study the melting of the supersolid phase with increasing temperature, map out a finite temperature phase diagram of the system at fixed filling, and determine the parameter region where the supersolid phase can possibly be observed in experiments.

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