Dipolar fermions in a two-dimensional lattice at nonzero temperature

2012/06/21 by Anne-Louise Gadsbolle, Anne-Louise Gadsbølle, Georg M. Bruun +1 · 18 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dipole #Fermion #Lattice (music) #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Square lattice #Superconductivity #Superfluidity #Transition temperature #Trapping #cond-mat.quant-gas

paper · pdf · doi:10.1103/physreva.86.033623

published in Physical Review A 86(3) (American Physical Society) · 7 pages, 8 figures. Prepared for submission to PRA

arxiv created 2012/06/21 · openalex publication_date 2012/09/24 · arxiv updated 2012/09/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We examine density-ordered and superfluid phases of fermionic dipoles in a two-dimensional square lattice at nonzero temperature. The critical temperature of the density-ordered phases is determined and is shown to be proportional to the coupling strength for strong coupling. We calculate the superfluid fraction and the Berezinskii-Kosterlitz-Thouless transition temperature of the superfluid phase. We finally analyze the effects of an external harmonic trapping potential.

Citations

• Supersolid phase of cold fermionic polar molecules in two-dimensional optical lattices
• Density-wave instability in a two-dimensional dipolar Fermi gas
• Stabilization of a purely dipolar quantum gas against collapse
• Strong dipolar effects in a quantum ferrofluid
• Stability of Superfluid and Supersolid Phases of Dipolar Bosons in Optical Lattices
• Ordering, metastability and phase transitions in two-dimensional systems