Quantum fluctuations of thermal transport coefficients in mesoscopic systems

The quantum interference effects in small-size samples are discussed. Using : a corrected Wiedemann-Franz law, we obtain the functional dependence of t he relative thermal conductivity on the relative electrical conductivity. T he results show that the fluctuations of thermal transport coefficients hav e a periodic oscillation corresponding to the electrical conductivity fluct uation, but the amplitudes of them are different for different materials. ( C) 1999 Elsevier Science B.V.