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Properties of high- T C Copper Oxides from Band Models ofSpin-Phonon Coupling

Jarlborg, T.

In: Journal of Superconductivity and Novel Magnetism, 2009, vol. 22, no. 3, p. 247-250

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    Titre
    • Properties of high- T C Copper Oxides from Band Models ofSpin-Phonon Coupling
    Auteur
    • Jarlborg, T.. DPMC, University of Geneva, 24 Quai Ernest-Ansermet, 1211, Geneva 4, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Superconductivity and Novel Magnetism, 2009, vol. 22, no. 3, p. 247-250. Springer US; http://www.springer-ny.com
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:312239
    Summary
    The mechanism of spin-phonon coupling (SPC) and possible consequences for the properties of high-T C copper oxides are presented. The results are based on ab initio LMTO band calculations and a nearly free-electron (NFE) model of the band near E F . Many observed properties are compatible with SPC, as for the relation between doping and $\vec{q}$ for spin excitations and their energy dependence. The main pseudogap is caused by SPC and waves along [1,0,0], but it is suggested that secondary waves, generated along [1,1,0], contribute to a ‘waterfall' structure. Conditions for optimal T C , and the possibilities for spin enhancement at the surface are discussed