Temperature dependence of the Hall factor and the conductivity mobility in rho - type silicon

The authors have measured the Hall coefficient of ultra pure rho -type silicon as a function of both magnetic field and temperature in the range 20-50 K, where acoustic phonon scattering dominates. The temperature dependences of the Hall factor and both the Hall and the conductivity mobilities have been determined. The Hall factor was found to have a small deviation from the generally accepted value of 3 pi /8 and to be slightly temperature dependent. The temperature dependence of the conductivity mobility was found to be T super(-1.75 plus or minus 0.05).