ELECTRONIC RAMAN-SPECTRA FOR D+S WAVE SUPERCONDUCTIVITY

We extend previous theoretical results of the literature to compute th e electronic Raman spectra in the case of d + s wave superconductivity . We thus can reasonably describe the Raman spectra observed both in o rthorhombic YBCO(123) and tetragonal Hg(1212). In particular, there se ems to be a significant s-wave component in the latter compound. This may imply a breakdown of tetragonality in the superconducting phase of some superconductors of which crystal symmetry is believed to be tetr agonal.