Electronic contribution to the thermal conductivity of noble metals in the low-temperature region (T≤15)

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Abstract
The electronic contribution to the low-temperature thermal conductivity of the noble metals copper and silver is calculated by a variational method for two different pseudopotentials. We describe the Fermi surface of the noble metals by the simple eight-cone model and take into account two OPW corrections which are very important at the lowest temperatures. The trial distribution function is expanded to the fifth power in the energy. Cubic terms in the energy are found to lower the first-order result by about 20% whereas the fifth-order corrections are negligible. The results of the calculation are discussed and compared with experimental data.

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