Band spectrum transformation and temperature dependences of thermoelectric power of Hg1-xRxBa2Ca2Cu3O8+δ system

Abstract

Temperature dependences of thermoelectric power S(T) at T > Tc of the Hg-based high temperature superconductors Hg 1−x RxBa 2 Ca 2 Cu 3 O 8+δ (R=Re, Pb) have been analyzed with accounting for strong scattering of charge carriers. Transformation of parameters of a narrow conducting band in the region of the Fermi level was studied. The existence of correlation between the effective bandwidth and the temperature of a superconductive transition Tc is shown.