Critical behavior of the thermoelectric transport properties in amorphous systems near the metal-insulator transition

The scaling behavior of the thermoelectric transport properties in disordered systems is studied in the energy region near the metal-insulator transition. Using an energy-dependent conductivity a obtained experimentally, we extend our linear-response-based transport calculations in the three-dimensional Anderson model of localization. Taking a dynamical scaling exponent z in agreement with predictions from scaling theories, we show that the temperature-dependent sigma, the thermoelectric power S, the thermal conductivity K and the Lorenz number L-0 obey scaling.