Superconducting glass behaviour in the random interaction Hubbard model

✍ Scribed by Tadeusz K. Kopeć; Piotr Wróbel

• Book ID: 104356238
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 330 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80108-7

✦ Synopsis

The extended Hubbard model with on-site attraction and random infinite-range inter-site Coulomb interaction is stUdied for the arbitrary band filling. In the strong coupling regime the problem is mapped onto a system of hard-core bosons (local electron pairs) on a lattice described by the anisotropic pseudo-spin model with infinite-range random interactions -in close analogy to the standard Sherrington-Kirkpatrick spin-glass approach. The stability of the mean-field-type solution against the action of fluctuation is investigated in the parameter space including: the temperature, degree of disorder and band filling parameter.