General model of pressure-induced transition temperature increase with focus on the Hg—Ba—Ca—Cu—O system

✍ Scribed by Mario Rabinowitz; T. McMullen

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 306 KB
• Volume: 218
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)00028-x

✦ Synopsis

A general calculation of high-pressure-induced transition temperature (T,) increases for oxide superconductors gives a good description for the Hg-Ba-Ca-Cu-0 system. Predictions are made of the maximum Ts u _ 163, 154, and 111 K compared with Ty = 164,154, and 118 K respectively for the superconducting phases of Hg-1223, Hg-12 12, and Hg-1201 as a function of their compressibilities, agreeing with experiment. The theoretical result is in the form of a universal scaling equation for the fractional change in T', as a function of pressure, which is derived from a recent phenomenological theory of short coherence length superconductivity.