Correlation of strontium anharmonicity with charge-lattice dynamics of the apical oxygens and their coupling to cuprate superconductivity

Steven D. Conradson, Victor Velasco, Marcello B. Silva Neto +12

Cu K edge X-ray absorption spectra of overdoped superconducting $YS{r}_{2}C{u}_{2.75}M{o}_{0.25}{O}_{7.54}$ and $S{r}_{2}Cu{O}_{3.3}$ show a remarkably strong correlation of their superconductivit…