Electronic thermal properties of the interface between a normal metal and a high-temperature superconducting material

The electron thermal flux and electron thermal conductivity of the interfac e between a normal metal and a high-temperature superconductor (HTSC) are c alculated using quasiclassical equations. Calculations are made for various values of the interface transparency and various orientations of the axes of a HTSC crystal. It was shown that compared with an interface between a n ormal metal and an "ordinary" superconductor (s-type symmetry, isotropic or der parameter), the thermal conductivity of an HTSC-normal-metal interface is substantially higher and has a nonactivation dependence. The thermal pro perties were calculated for various interface models, including mirror and diffuse, and also for various potential barrier profiles. An analysis is ma de of the possibility of using devices based on normal-metal-HTSC interface s for bolometric and microrefrigerator applications. (C) 2000 MAIK "Nauka / Interperiodica".