Hot-carrier thermal conductivity from the simulation of submicron semiconductor structures

We propose a novel numerical procedure to calculate the hot-carrier thermal conductivity in bulk semiconductors. The method is based on combining Monte Carlo and hydrodynamic simulations of carrier transport in submicron inhomogeneous structures. Application to a Si structure indicates a decrease over one order of magnitude of the thermal conductivity of electrons at electric fields over , in close agreement with recent results obtained within the correlation-function formalism.