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- Title
POLARONIC MECHANISM OF SUPERCONDUCTIVITY IN DOPED FULLERIDE SYSTEMS.
- Authors
TIWARI, SURESH CHANDER; KASHYAP, ARVIND; SURANA, ANIL K.; PALIWAL, RADHA K.; KAKANI, SHYAM L.
- Abstract
A polaronic model of superconductivity in doped fulleride systems is presented. The normal and anomalous one-particle Green's functions are derived for a system with strong electron phonon coupling. The study of collapse of the electron band and the phonon vacuum is presented within the mean-field approximation. Self-consistent equation for the superconductivity order parameter (Δ) is derived using Green's fucntion technique and following Lang and Firsov transformations. Expressions for specific heat, density of states, free energy and critical field based on this model have been derived. The theory is applied to explain the experimental results in the systems K3C60 and Rb3C60. These results are in good agreement with the available experimental data.
- Subjects
GREEN'S functions; DIFFERENTIAL equations; ELECTRONS; PHONONS; QUASIPARTICLES; PHYSICS; PHYSICAL sciences
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2009, Vol 23, Issue 4, p615
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979209049899