Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules
Name
Potter-2010-Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules.pdf
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Author(s)
Potter, Andrew Cole
Berg, Erez
Wang, Daw-Wei
Halperin, B. I.
Demler, Eugene
Date Issued
November 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Potter, Andrew et al. “Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules.” Physical Review Letters 105 (2010). © 2010 The American Physical Society
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.220406
