Properties of a local pairing model of high-Tc superconductivity

✍ Scribed by Betty Ng; D.J. Newman

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 709 KB
• Volume: 170
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(90)90015-7

✦ Synopsis

A simulation technique is used to study the properties of the "hole modulated hopping" model introduced by Hirsch. The superconducting order parameter, energy gap and pair size have been determined for a range of particle densities and temperatures in the neighbourhood of the superconducting phase transition.

Results are consistent with the interpretation of the superconducting transition to be Bose-like at low hole densities and BCS-like at high hole densities, with a crossover near the T, maximum in the r, versus hole density curve. This behaviour is related to the existence of small non-overlapping pairs at low hole densities and large strongly interpenetrating pairs at hole densities above the T, maximum.