Properties of high-$T_c$ copper oxides from band models of spin-phonon coupling

Details Properties of high-$T_c$ copper oxides from band models of spin-phonon coupling Properties of high-$T_c$ copper oxides from band models of spin-phonon coupling

2009-02-20

arxiv.org/abs/0902.3580v1

J. Supercond Nov Magn, 22, 247 (2009)

Physics

Condensed Matter

Superconductivity

3 pages, 3 figures, Proceedings of Stripes08, Erice July 2008

Scientific paper

The mechanism of spin-phonon coupling (SPC) and possible consequencies 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 possiblities for spin enhancement at the surface are discussed.

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