The heat conductivity of superconductors below 1° K

Abstract

Abstract A method for the accurate measurement of thermal conductivity in the temperature region below 1°K has been developed. This method has been used to determine the heat conductivity of very pure samples of lead, tin, indium, thallium, tantalum and columbium between 0·2 and 1°K. The results have been discussed with reference to theory and to the experiments at higher temperatures. The conclusion is reached that the heat conductivity of a superconductive metal near absolute zero is identical with that of a dielectric crystal.