Thermal transport in a granular metal array

Simple item page
dc.creatorTripathi, V.
dc.creatorLoh, Y. L.
dc.date2005-08-01
dc.date2005-12-27
dc.date.accessioned2026-07-07T06:41:29Z
dc.date.available2026-07-07T06:41:29Z
dc.descriptionWe obtain the Kubo formula for the electronic thermal conductivity kappa(T) of a granular metal array at low temperatures for the Ambegaokar-Eckern-Schoen (AES) model and study the kinetic and potential contributions in the diamagnetic (local) and paramagnetic (current-current) terms. For small values of dimensionless intergrain tunneling conductance, g << 1, we show that inelastic cotunneling processes contribute to thermal conductivity due to non-cancellation of the diamagnetic and paramagnetic terms, unlike electrical conductivity. We find that the electrical conductivity obeys the Arrhenius law, sigma(T) ~ ge^{-E_c/T}, however kappa(T) decreases only algebraically, kappa(T) \~ g^2 T^3/E_c^2. At large values of intergrain coupling, g >> 1, we find it plausible that the Wiedemann-Franz law weakly deviates from the free-electron theory due to Coulomb effects.
dc.description5 pages RevTeX, to appear in Physical Review Letters
dc.identifierhttps://arxiv.org/abs/cond-mat/0508053
dc.identifierhttp://arxiv.org/abs/cond-mat/0508053
dc.identifierPhysical Review Letters 96, 046805 (2006)
dc.identifierdoi:10.1103/PhysRevLett.96.046805
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/101683
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleThermal transport in a granular metal array
dc.typetext

Files

Collections

arXiv