The common features in the Raman data of high temperature superconductors:
(the cuprates, bismathates, alkali doped fullerides and some organic
superconductors), are analyzed. It was shown that qualitative understanding of
the data can be achieved in terms of non-Fermi liquid models for their normal
state, with appropiate bag mechanisms for the superconducting state.Comment: To appear in Physica B (1996). Invited talk presented by S. N.
Behera, Latex file in revtex style, six figures available on request to first
author (e-mail : [email protected]