Convective heat conductivity of layered HTSC

On the basis of the assumption that the Cu-O layers in strongly anisotropic high-temperature superconductors (HTSCs) are characterized by magnetic vortices of variable polarity, it is suggested that the properties of heat transfer in zero-magnetic-field HTSC materials must differ from those of traditional HTSCs. Calculations are presented showing that the convective heat flow in planar or layered HTSCs is determined not only by the energy transfer due to regular mechanisms of excitation, but also by a flow of vortexlike magnetic excitations carrying surplus entropy of electrons localized in the HTSC core.