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

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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 σ 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 σ, the thermoelectric power S, the thermal conductivity K and the Lorenz number L₀ obey scaling.