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The Fermion-Lochon model and the pseudogap in cuprate superconductors

Sinha, KP (1999) The Fermion-Lochon model and the pseudogap in cuprate superconductors. In: 1999 University of Miami Conference on High Temperature Superconductivity, 7-13 Jan. 1999, Coral Gables, FL, USA, pp. 122-125.

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The interaction mechanism involving fermions and lochons (local charged bosons) located at polarizable dielectric regions in the layered cuprate systems is discussed in the context of the pairing symmetry, the appearance of the resonance peak and the pseudogap which is seen above $T_c$. It is found that the mechanism allows both s and d waves and the dominance of one or the other depends on the relative values of the Fermi energy and the nearest neighbor hopping integral. The model accounts for the pseudogap and the resonance peak is identified with the local pair fluctuation state. The mechanism, along with a weak phonon contribution, emerges as an acceptable model for NTSC

Item Type: Conference Paper
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to AIP- American Institute of Physics
Keywords: dielectric polarisation;Fermi level;fermions;high temperature superconductors;phonons;resonance
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 26 Jul 2007
Last Modified: 27 Aug 2008 12:43
URI: http://eprints.iisc.ac.in/id/eprint/10297

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