Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/10054/9201
Title: The critical temperature of a superconductor on a possible E center dot p mediated pairing mechanism
Authors: SRIVASTAVA, CM
Keywords: Electronic-Structure
Fermi-Surface
Energy
State
Tc
Issue Date: 2006
Publisher: IOP PUBLISHING LTD
Citation: JOURNAL OF PHYSICS-CONDENSED MATTER, 18(1), 143-164
Abstract: The possibility of pairing correlations arising from the quenching of the repulsive electron-ion Darwin term in the pairon (Cooper pair) state is examined. Two pairing processes, arising from ionic density fluctuations (phonons) and from electronic density fluctuations (excitons), are shown to dominate in low T(c) and high T(c) superconductors, respectively. Based on a two-body E (.) p interaction potential the BCS type of wavefunction and reduced Hamiltonian are obtained. As quenching occurs only when a pairon is scattered by the nucleus without recoil between an electron and a hole section of the Fermi surface, a two-band model with umklapp processes gives the T(c) equation for both the phonon- and exciton-coupled superconductors whose solution is similar to that obtained by Eliashberg equations except that the dependence of T(c) on structure is explicitly included.
URI: http://dx.doi.org/10.1088/0953-8984/18/1/011
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9201
http://hdl.handle.net/10054/9201
ISSN: 0953-8984
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