PL EN


Preferences help
enabled [disable] Abstract
Number of results
2007 | 111 | 5 | 745-752
Article title

The BCS-BEC Crossover and Superconductivity in a Lattice Fermion Model with Hard Core Repulsion

Authors
Content
Title variants
Languages of publication
EN
Abstracts
EN
We considered the BCS-BEC crossover at T=0 in the framework of a lattice fermion model (the extended Hubbard model). We analyzed the case of on-site hard core repulsion (U=∞) and intersite attraction (W<0) in a 3D system with extended s-wave pairing symmetry. The mechanisms of density-driven and attraction-strength-driven crossover were analyzed. We obtained the ground state phase diagram. The analyzed quantities are: chemical potential, order parameter, coherence length, and fraction of condensed particles.
Keywords
Contributors
author
  • Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
References
  • 1. J.G. Bednorz, K.A. Muller, Z. Phys. B, 64, 1898, 1986
  • 2. R. Micnas, J. Ranninger, S. Robaszkiewicz, Rev. Mod. Phys., 62, 113, 1990
  • 3. Q. Chen, J. Stajic, S. Tan, K. Levin, cond-mat/0404274 (2004)
  • 4. C.A. Regal, M. Greiner, D.S. Jin, Phys. Rev. Lett., 92, 040403, 2004
  • 5. P. Noziéres, S. Schmitt-Rink, J. Low Temp. Phys., 59, 195, 1985
  • 6. R. Micnas, S. Robaszkiewicz, NATO ASI Series E, 342, 31, 1997
  • 7. R. Micnas, J. Ranninger, S. Robaszkiewicz, S. Tabor, Phys. Rev. B, 37, 9410, 1988; B. Tobijaszewska, R. Micnas, Phys. Status Solidi B, 243, 159, 2006
  • 8. A.J. Leggett, J. Phys. (Paris) Colloq., 41, C7-19, 1980
  • 9. F. Pistolesi, Ph. Noziéres, Phys. Rev. B, 66, 054501, 2002
  • 10. Y.J. Uemura, G.M. Luke, B.J. Sternlieb, J.H. Brewer, J.F. Carolan, W.N. Hardy, R. Kadono, J.R. Kempton, R.F. Kiefl, S.R. Kreitzman, P. Mulhern, T.M. Riseman, D.U. Williams, B.X. Yang, S. Uchida, H. Takagi, J. Gopalakrishnan, A.W. Sleight, M.A. Subramanian, C.L. Chien, M.Z. Cieplak, Gang Xiao, V.Y. Lee, B.W. Statt, C.E. Stronach, W.J. Kossler, X.H. Yu, Phys. Rev. Lett., 62, 2317, 1989; Y.J. Uemura, L.P. Le, G.M. Luke, B.J. Sternlieb, W.D. Wu, J.H. Brewer, T.M. Riseman, C.L. Seaman, M.B. Maple, M. Ishikawa, D.G. Hinks, J.D. Jorgensen, G. Saito, H. Yamochi, Phys. Rev. Lett., 66, 2665, 1991
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv111n511kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.