Superconductivity-induced changes of the phonon resonances in RBa_2Cu_3O_7 (R=rare earth)

S. Ostertun, J. Kiltz, A. Bock +2

We observe a characteristic energy $\hslash {\omega }_c\approx 2.1$ eV which separates regions of different behavior of the phonon intensities in the Raman spectra of the $R\mathrm{B}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_7$…