Thermal conductivity in disordered interacting-electron systems

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Abstract
We study the heat diffusion and the thermal conductivity of the interacting disordered electron liquid in the metallic regime close to the metal-insulator transition. The heat-diffusion constant provides a direct measurement of the quasiparticle diffusion constant which scales differently from the charge-diffusion coefficient. The thermal conductivity scales like the electrical conductivity establishing the validity of the Wiedemann-Franz law up to the metal-insulator transition.