Solid phases and pairing in a mixture of polar molecules and atoms

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

DOI:https://doi.org/10.1103/PHYSREVA.83.053611· OSTI ID:21546824

Capogrosso-Sansone, B ^[1]

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1. Institute for Theoretical Atomic, Molecular, and Optical Physics, Harvard-Smithsonian Center of Astrophysics, Cambridge, Massachusetts 02138 (United States)

We consider a mixture of hard-core bosonic polar molecules, interacting via repulsive dipole-dipole interaction, and one atomic bosonic species. The mixture is confined on a two-dimensional square lattice and, at low enough temperatures, can be described by the two-component Bose-Hubbard model. The latter displays an extremely rich phase diagram including solid, superfluid, and supersolid phases. Here, we mainly focus on the checkerboard molecular solid, stabilized by the long-range dipolar interaction, and study how the presence of atoms affects its robustness both at zero and finite temperatures. We find that, due to atom-molecule interactions, solid phases can be stabilized at both (much) lower strengths of dipolar interaction and higher temperatures, than when no atoms are present. As a byproduct, atoms also order in a solid phase with the same melting temperatures as for molecules. Finally, we find that for large enough interaction between atoms and molecules, a paired supersolid phase can be stabilized.

• OSTI ID: 21546824
• Journal Information: Physical Review. A, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.053611; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOM-MOLECULE COLLISIONS
ATOMS
DIPOLES
HUBBARD MODEL
INTERACTIONS
MELTING POINTS
MOLECULES
PHASE DIAGRAMS
SOLIDS
SUPERFLUIDITY
TETRAGONAL LATTICES
TWO-DIMENSIONAL CALCULATIONS
ATOM COLLISIONS
COLLISIONS
CRYSTAL LATTICES
CRYSTAL MODELS
CRYSTAL STRUCTURE
DIAGRAMS
INFORMATION
MATHEMATICAL MODELS
MOLECULE COLLISIONS
MULTIPOLES
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE