• Corpus ID: 118410249

Pairing with Unconventional Symmetry around BCS-BEC Crossover: Fermionic Atoms in 2D Optical Lattices to Correlated Electron Systems

@article{Volko2007PairingWU,
  title={Pairing with Unconventional Symmetry around BCS-BEC Crossover: Fermionic Atoms in 2D Optical Lattices to Correlated Electron Systems},
  author={Du{\vs}an Vol{\vc}ko and Khandker F. Quader},
  journal={arXiv: Superconductivity},
  year={2007}
}
We study superfluid properties of fermions on a 2D lattice using a finite-range pairing interaction derivable from an extended Hubbard model. We obtain signatures of unconventional pair-symmetry states, $d_{x^2-y^2}$ and extended-s ($s^*$), in the BCS-BEC crossover region. The fermion momentum distribution function, $v_k^2$, the ratio of the Bogoliubov coefficients, $v_k/u_k$, and the Fourier transform of $v_k^2$ are among the properties that are strikingly different for d- and $s^*$ symmetries… 
1 Citations

Figures from this paper

Role of the attractive intersite interaction in the extended Hubbard model

We consider the extended Hubbard model in the atomic limit on a Bethe lattice with coordination number z. By using the equations of motion formalism, the model is exactly solved for both attractive

References

SHOWING 1-10 OF 13 REFERENCES

Condensed matter theories.

Rev

  • Mod. Phys. 62, 113
  • 1990

Modern trends in the theory of condensed matter : proceedings of the XVI Karpacz Winter School of Theoretical Physics, February 19-March 3, 1979, Karpacz, Poland

Bio-inspired Autonomic Structures: a middleware for Telecommunications Ecosystems and a Rate Feedback Predictive Control Scheme Based on Neural Network and Control Theory for Autonomic Communication.

Phys

  • Rev. Lett. Phys. Rev. Lett. 95, 243202
  • 2005

Other work on Hubbard models

  • Phys. Rev. Lett
  • 1990

The issue of phase separation is not settled. Evidence for it has been found in some work on 2D t-J models

  • J. Phys. Soc. Japan
  • 1996

Phys

  • Rev. B53, R2995
  • 1996

europhysicsnews

  • 37,18
  • 2006

Phys

  • Rep. 250, 329
  • 1995

Phys

  • Rev. B37, 3664
  • 1988