We have measured the temperature dependence of the thermopower and resistivity of amorphous In-Sb for several compositions near the metal-insulator transition. The thermopower, S, is observed to correlate with the resistivity, ρ, such that ‖S‖∝${\rho }^{0.26}$ and a deviation of the low-temperature thermopower parameter from the expected behavior for an amorphous metal is in qualitative agreement with a prediction for the effect of electron-electron interactions on the thermopower.

• Received 2 February 1988

DOI:https://doi.org/10.1103/PhysRevB.38.3777