Temperature dependence of the photothermal conductivity of semiconductors at low temperatures

Abstract
A careful analysis has been made of the temperature dependence of the signal strength in a photoconductivity experiment in a semiconductor. The temperature dependence of the line intensity in a photothermal conductivity spectrum has been calculated. The results are in excellent agreement with measurements on high-purity germanium containing boron, aluminium and phosphorus as residual impurities ( approximately 1011 atoms cm-3).