Table of Contents
International Journal of Superconductivity
Volume 2013, Article ID 581025, 13 pages
http://dx.doi.org/10.1155/2013/581025
Research Article

Polaronic Mechanism of Superconductivity in Cuprates

1Department of Physics, Government Polytechnic College, Chittorgarh, Rajasthan 312001, India
2Department of Physics, Sangam University, N.H. No. 79, Bhilwara By-Pass, Chittor Road, Bhilwara, Rajasthan 311001, India
3Department of Physics, M.L.V. Government College, Bhilwara, Rajasthan 311001, India
4Department of Physics, Mewar University, Gangrar, Chittorgarh, Rajasthan 312901, India
54-G-45, Shastri Nagar, New Housing Board, Bhilwara, Rajasthan 311001, India

Received 15 April 2013; Accepted 13 June 2013

Academic Editor: Zigang Deng

Copyright © 2013 Pradeep Chaudhary et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A strong polaron pairing model of high-temperature cuprate superconductors is presented. The normal and anomalous one-particle Green’s functions are derived from a system with strong electron-phonon coupling. Self-consistent equation for the superconducting order parameter () is derived using Green’s function 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 system . There is convincing evidence that the theory is fully compatible with the key experiments.