Thermal transport in BPSCCO system between 20 and 170 K

Thermal conductivity of superconducting (Bi,Pb)2223 pellet in the temperatu re range 20-170 It is reported. Electronic contribution to thermal conducti vity in the normal state is estimated to be similar to 25%. Considering bot h phonon and phonon + electron approach, we attempted to examine the observ ed nature of the temperature dependence of thermal conductivity. Our analys is strongly supports the role of phonons as well as electrons in the origin of the thermal conductivity peak in the superconducting state. Some of the microscopic quantities evaluated from the best-fit parameters obtained fro m phonon; electron approach give reasonable values.