Scientific conference paper We report thermopower and electrical resistance measurements of the high-temperature superconductor Bi2Sr2Ca1-xPrxCu2O8+delta (0 < x < 1) in a wide temperature range from 600 K to superconducting transition temperature (critical temperature, T-c). The transition temperature decreases with increasing x. Resistance obeys usual metallic linearity at higher temperatures, whereas at lower temperatures, before T-c (T similar to 300 K), a deviation from the linear trend is observed. Thermopower exhibits apparently non-metallic behavior - it increases with decreasing temperature and develops a broad maximum whose position and width increase with x. The results are discussed in the framework of several models present in the literature.
Pierluigi Bruzzone, Kamil Sedlák, Nikolay Bykovskiy, Ortensia Dicuonzo