Low-temperature thermal conductivity of GexAs40−xS60 glasses

Thermal conductivity, k, of GexAs40−xS60 glasses has been measured between 4.5 and 300 K. A variation of k with the composition is found and dependences of its parameters on the mean coordination numbers are established. Analyses have been made within but also independently of the soft-potential model. Some correlations and scaling laws are proposed.