Properties of high-Tc copper oxides from band models of spin-phonon coupling
Abstract
The mechanism of spin-phonon coupling (SPC) and possible consequencies for the properties of high-TC 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 EF. Many observed properties are compatible with SPC, as for the relation between doping and 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 TC, and the possiblities for spin enhancement at the surface are discussed.
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