Thermal Conductivity of Indium-Thallium Alloys at Low Temperatures

Abstract

The thermal conductivity of a series of homogeneous, solid solution indium-thallium alloys containing up to 50 atomic percent of thallium has been measured as a function of temperature at liquid helium temperatures and as a function of both longitudinal and transverse magnetic fields below $T_c$, the superconducting transition temperature in zero field. The normal-state results agree quite well with the quasi-free electron theory of metals. The superconducting-state results agree with the hypotheses that electrons in the "superconducting phase" neither transport heat nor scatter phonons.