Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
- Physics Department and NCTS, National Tsing-Hua University, Hsinchu 30013, Taiwan (China)
We consider a layered system of fermionic molecules with permanent dipole moments aligned perpendicular to the layers by an external field. The dipole interactions between fermions in adjacent layers are attractive and induce interlayer pairing. Because of the competition for pairing among adjacent layers, the mean-field ground state of the layered system is a dimerized superfluid, with pairing only between every other layer. We construct an effective Ising-XY lattice model that describes the interplay between dimerization and superfluid phase fluctuations. In addition to the dimerized superfluid ground state, and high-temperature normal state, at intermediate temperature, we find an unusual dimerized ''pseudogap'' state with only short-range phase coherence. We propose light-scattering experiments to detect dimerization.
- OSTI ID:
- 21541745
- Journal Information:
- Physical Review Letters, Vol. 105, Issue 22; Other Information: DOI: 10.1103/PhysRevLett.105.220406; (c) 2010 American Institute of Physics; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DIMERIZATION
DIPOLE MOMENTS
DIPOLES
FERMIONS
INTERACTIONS
LAYERS
LIGHT SCATTERING
MEAN-FIELD THEORY
MOLECULES
SUPERFLUIDITY
TEMPERATURE RANGE 0400-1000 K
CHEMICAL REACTIONS
MULTIPOLES
POLYMERIZATION
SCATTERING
TEMPERATURE RANGE