Supersolid phase of cold fermionic polar molecules in two-dimensional optical lattices

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053629· OSTI ID:21546842

Liang, He; Hofstetter, Walter ^[1]

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1. Institut fuer Theoretische Physik, Goethe-Universitaet, D-60438 Frankfurt am Main (Germany)

We study a system of ultracold fermionic polar molecules in a two-dimensional square lattice interacting via both the long-range dipole-dipole interaction and a short-range on-site attractive interaction. Singlet-superfluid, change 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.

• OSTI ID: 21546842
• Journal Information: Physical Review. A, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.053629; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DENSITY
DIPOLES
FERMIONS
INTERACTIONS
MELTING
MOLECULES
PHASE DIAGRAMS
SOLIDS
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
TETRAGONAL LATTICES
TWO-DIMENSIONAL CALCULATIONS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIAGRAMS
INFORMATION
MULTIPOLES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES