Pairing Scenarios for the Hubbard Model in the Strong Coupling Limit

• Authors: V. Apinyan , T. Kopeć
• Languages of publication: EN

Abstracts

EN

We consider a spin-rotationally invariant Hubbard model. The original electron operator is presented in the charge-spin-fermion U(1)×SU(2) factorized form. The factorization procedure is given in terms of the emergent gauge fields. As a result, the electron appears like a composite object consisting of strongly fluctuating phase field and spatially rotating spin axis. Furthermore, we elaborate microscopically on the form of possible pairing states.

Keywords

EN

71.27.+a; 71.10.Fd; 74.20.Rp

Discipline

• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)
• 74.20.Rp: Pairing symmetries (other than s-wave)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 159-163

Dates

published

2008-07

received

2007-11-06

Contributors

author

V. Apinyan

• Institute for Low Temperature and Structure Research, P.O. Box 1410, 50-950 Wrocław 2, Poland

author

T. Kopeć

• Institute for Low Temperature and Structure Research, P.O. Box 1410, 50-950 Wrocław 2, Poland

References

• 1. T.K. Kopec, Phys. Stat. Sol. B 244, 2458 (2007)
• 2. See for instance J.W. Negele, H. Orland, in: Quantum Many Particle Systems, Frontiers in Physics, Addison-Wesley, Boston 1988
• 3. T.K. Kopec, Phys. Rev. B 73, 132512 (2006)
• 4. N. Dupuis, S. Pairault, Int. J. Mod. Phys. B 14, 2529 (2000)
• 5. G. Baskaran, Z. Zou, P.W. Anderson, Solid State Commun. 63, 973 (1987)
• 6. A. Auerbach, Interacting Electrons and Quantum Magnetism, Springer-Verlag, New York 1994
• 7. V.A. Apinyan, T.K. Kopeć, in preparation

Identifiers

DOI

10.12693/APhysPolA.114.159