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A Combined Mechanism Mediated by Lochons and Phonons for Cuprate Superconductors

Sinha, KP (1998) A Combined Mechanism Mediated by Lochons and Phonons for Cuprate Superconductors. In: Modern Physics Letters B [Condensed Matter Physics; Statistical Physics and Applied Physics], 12 (20). pp. 805-818.

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Abstract

We present a brief review of the combined pairing mechanism mediated by phonons and lochons (local charged bosons) for the high temperature superconducting materials (mainly cuprates). The phonon contribution $(\lambda_p)$ being weak, the lochon part $(\lambda_{\mid})$ dominates to give higher critical temperatures $(T_c)$. The combined mechanism along with the variation of $\lambda_{\mid}$ with carrier concentration $(x_c)$ gives the right variation of $T_c$ and the oxygen isotope exponent on doping. The superconducting gap $\bigtriangleup$(0) at T = 0, its ratio with $T_c$, the condensation energy, gap anisotropy, pseudogap, etc. are also discussed.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to World Scientific Publishing Company.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 11 Aug 2006
Last Modified: 27 Aug 2008 12:16
URI: http://eprints.iisc.ernet.in/id/eprint/8023

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