M. Opel et al., A STUDY OF CRITICAL AND THERMAL PAIR-BREAKING IN DIFFERENTLY DOPED CU-O SUPERCONDUCTORS BY ELECTRONIC RAMAN-SCATTERING, Czechoslovak journal of Physics, 46, 1996, pp. 1107-1108
Experimental results for the electronic Raman effect in differently do
ped Cu-O superconductors are presented. Below T-c both critical pair b
reaking at frequencies close to the maximum of the gap and thermal pai
r breaking in the limit of small energy transfer is observed and found
to be strongly polarization dependent. For all doping levels studied
the spectra exhibit frequency and temperature power laws which are typ
ical for an unconventional gap with line nodes.