On the BCS-BEC Crossover in the Spin-Polarized Attractive Hubbard Model at T=0

• Authors: A. Kujawa-Cichy
• Languages of publication: EN

Abstracts

EN

The influence of the Zeeman magnetic field (h) on the ground state evolution of superfluid properties from the weak coupling (BCS-like) to the strong coupling limit of tightly bound local pairs with increasing attraction has been studied. The analysis was carried out within the spin-polarized attractive Hubbard model, for a fixed number of particles and a d = 3 simple cubic lattice. The broken symmetry Hartree approximation was used. For strong attraction and in the dilute limit, the homogeneous magnetized superconducting phase (SC_{M}) was found in the h-|U| and P-|U| diagrams.

Keywords

EN

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

Discipline

• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)
• 71.10.Hf: Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
• 74.20.Rp: Pairing symmetries (other than s-wave)

• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 2
• Pages: 423-425

Dates

published

2010-08

Contributors

author

A. Kujawa-Cichy

• Solid State Theory Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

• 1. M.W. Zwierlein, J. Abo-Shaeer, A. Schirotzek, C. Schunck, W. Ketterle, Nature 435, 1047 (2005)
• 2. M.W. Zwierlein, A. Schirotzek, C.H. Schunck, W. Ketterle, Science 311, 492 (2006)
• 3. M.W. Zwierlein, W. Ketterle, cond-mat/0603489
• 4. G.B. Partridge, W. Li, R.I. Kamar, Y. Liao, R.G. Hulet, Science 311, 503 (2006)
• 5. P. Fulde, R.A. Ferrell, Phys. Rev. 135, A550 (1964)
• 6. A.I. Larkin, Y.N. Ovchinnikov, Zh. Eksp. Teor. Fiz. 47, 1136 (1964)
• 7. G. Sarma, J. Phys. Chem. Solids 24, 1029 (1963)
• 8. D.E. Sheehy, L. Radzihovsky, Phys. Rev. Lett. 96, 060401 (2006)
• 9. M.M. Parish, F.M. Marchetti, A. Lamacraft, B.D. Simons, Phys. Rev. Lett. 98, 160402 (2007)
• 10. M.M. Parish, F.M. Marchetti, A. Lamacraft, B.D. Simons, Nature Phys. 3, 124 (2007)
• 11. R. Micnas, J. Ranninger, S. Robaszkiewicz, Rev. Mod. Phys. 62, 113 (1990)
• 12. A. Kujawa, R. Micnas, Acta Phys. Pol. A 114, 43 (2008)
• 13. A. Kujawa, R. Micnas, in preparation
• 14. A.J. Leggett, J. Phys. (Paris) Colloq. 41, C7 (1980)

Identifiers

DOI

10.12693/APhysPolA.118.423