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Title: Cold Attractive Spin Polarized Fermi Lattice Gases and the Doped Positive U Hubbard Model

Abstract

Experiments on polarized fermion gases performed by trapping ultracold atoms in optical lattices allow the study of an attractive Hubbard model for which the strength of the on-site interaction is tuned by means of a Feshbach resonance. Using a well-known particle-hole transformation we discuss how results obtained for this system can be reinterpreted in the context of a doped repulsive Hubbard model. In particular, we show that the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state corresponds to the striped state of the two-dimensional doped positive U Hubbard model. We then use the results of numerical studies of the striped state to relate the periodicity of the FFLO state to the spin polarization. We also comment on the relationship of the dx2y2superconducting phase of the doped 2D repulsive Hubbard model to a d-wave spin density wave state for the attractive case.

Authors:
 [1];  [2]
  1. ORNL
  2. University of California, Santa Barbara
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931029
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98
Country of Publication:
United States
Language:
English

Citation Formats

Moreo, Adriana, and Scalapino, D. J.. Cold Attractive Spin Polarized Fermi Lattice Gases and the Doped Positive U Hubbard Model. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.98.216402.
Moreo, Adriana, & Scalapino, D. J.. Cold Attractive Spin Polarized Fermi Lattice Gases and the Doped Positive U Hubbard Model. United States. doi:10.1103/PhysRevLett.98.216402.
Moreo, Adriana, and Scalapino, D. J.. Mon . "Cold Attractive Spin Polarized Fermi Lattice Gases and the Doped Positive U Hubbard Model". United States. doi:10.1103/PhysRevLett.98.216402.
@article{osti_931029,
title = {Cold Attractive Spin Polarized Fermi Lattice Gases and the Doped Positive U Hubbard Model},
author = {Moreo, Adriana and Scalapino, D. J.},
abstractNote = {Experiments on polarized fermion gases performed by trapping ultracold atoms in optical lattices allow the study of an attractive Hubbard model for which the strength of the on-site interaction is tuned by means of a Feshbach resonance. Using a well-known particle-hole transformation we discuss how results obtained for this system can be reinterpreted in the context of a doped repulsive Hubbard model. In particular, we show that the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state corresponds to the striped state of the two-dimensional doped positive U Hubbard model. We then use the results of numerical studies of the striped state to relate the periodicity of the FFLO state to the spin polarization. We also comment on the relationship of the dx2y2superconducting phase of the doped 2D repulsive Hubbard model to a d-wave spin density wave state for the attractive case.},
doi = {10.1103/PhysRevLett.98.216402},
journal = {Physical Review Letters},
number = ,
volume = 98,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}