Abstract
The effects of electron heating in free-standing n +-GaAs wires have been studied over the temperature range 0.45K–4.2K. The results indicate that for low lattice temperatures and heating currents the thermal transport in the wires is dominated by the electronic contribution. However, for lattice temperatures above 1K, an additional contribution to the thermal conductivity is observed that cannot be accounted for by the Wiedemann-Franz law.
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