Strongly enhanced thermal transport in a lightly doped Mott insulator at low temperature

Abstract

We show how a lightly doped Mott insulator has hugely enhanced electronic thermal transport at low temperature. It displays universal behavior independent of the interaction strength when the carriers can be treated as nondegenerate fermions and a nonuniversal "crossover" region where the Lorenz number grows to large values, while still maintaining a large thermoelectric figure-of-merit. The electron dynamics are described by the Falicov-Kimball model which is solved for arbitrary large on-site correlation with a dynamical mean-field theory algorithm on a Bethe lattice. We show how these results are generic for lightly doped Mott insulators as long as the renormalized Fermi liquid scale is pushed to very low temperature and the system is not magnetically ordered.

4 pages, 5 figures

References in corpus (3)

• Exact solution of the Falicov-Kimball model with dynamical mean-field theory
• Thermal transport in the Falicov-Kimball model on a Bethe lattice
• Probing the phase diagram of CeRu_2Ge_2 by thermopower at high pressure

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• Critical Exponents of Strongly Correlated Fermion Systems from Diagrammatic Multi-Scale Methods
• Universal thermopower of bad metals
• A Strange Metal from Gutzwiller correlations in infinite dimensions
• Multi-orbital Effects on Thermoelectric Properties of Strongly Correlated Materials
• Peltier effect in strongly driven quantum wires
• Resonant enhancement of thermoelectric properties by correlated hopping for the Falicov-Kimball model on Bethe lattice
• Energy and particle currents in a driven integrable system
• Thermoelectric transport parallel to the planes in a multilayered Mott-Hubbard heterostructure
• Thermoelectric properties of Mott insulator with correlated hopping at microdoping
• Thermopower of few-electron quantum dots with Kondo correlations