Spin-phonon coupling and q-dependence of spin excitations and high-Tc superconductivity from band models

  title={Spin-phonon coupling and q-dependence of spin excitations and high-Tc superconductivity from band models},
  author={Thomas N. Jarlborg},
  journal={Physical Review B},
  • T. Jarlborg
  • Published 15 April 2008
  • Physics
  • Physical Review B
Spin-phonon coupling (SPC) has been shown to be compatible with many unusual properties of the high-Tc copper oxides. Parameters from ab initio band calculations for unit cells of La2CuO4 are used in a free-electron-like model in order to study the variation in coupling between spin waves and different phonons. Different SPC for different phonons can explain the “hour-glass” shape of the spin excitations. The model predicts larger q vectors at less doping and rather complex isotope shifts. A… 
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