Effects of Jahn-Teller distortion on the superconducting gap

✍ Scribed by G. C. Rout; B. Pradhan; S. N. Behera

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 200 KB
• Volume: 3
• Category: Article
• ISSN: 1862-6351
• DOI: 10.1002/pssc.200541367

✦ Synopsis

Abstract

In the present communication we propose a microscopic model to study the interplay between Jahn‐Teller distortion and superconductivity in presence of impurity f‐electron levels of rare‐earth atoms and the hybridization between the impurity and the degenerate conduction electrons of Cu^2+^. The single particle electronic Green's functions are calculated by equations of motion and expressions for lattice strain (e) and superconducting gap (Δ) are evaluated. The temperature dependence of Δ and e are solved self‐consistently by numerical methods. Both the gap parameters show mean‐field behavior and very strong interaction between them. The superconducting order parameter is suppressed due to the presence of lattice distortion in the system and on the other hand the strain is suppressed in the temperature range of Δ. The effect of position of impurity level (ε ~f~)and the hybridization show many anomalous behavior. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)