Thermoelectric effects in correlated quantum dots and molecules

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SCHÖPS, Volker, Veljko ZLATIĆ, Theodoulos A. COSTI, 2011. Thermoelectric effects in correlated quantum dots and molecules. In: Journal of Physics: Conference Series. Institute of Physics Publishing (IOP). 273, 012155. ISSN 1742-6588. eISSN 1742-6596. Available under: doi: 10.1088/1742-6596/273/1/012155

@article{Schops2011Therm-57247, title={Thermoelectric effects in correlated quantum dots and molecules}, year={2011}, doi={10.1088/1742-6596/273/1/012155}, volume={273}, issn={1742-6588}, journal={Journal of Physics: Conference Series}, author={Schöps, Volker and Zlatić, Veljko and Costi, Theodoulos A.}, note={Article Number: 012155} }

2022-04-11T12:31:30Z Costi, Theodoulos A. We investigate thermoelectric properties of correlated quantum dots and molecules, described by a single level Anderson model coupled to conduction electron leads, by using Wilson's numerical renormalization group method. In the Kondo regime, the thermopower, S(T), exhibits two sign changes, at temperatures T = T<sub>1</sub> and T = T<sub>2</sub> > T<sub>1</sub>. We find that T<sub>2</sub> is of order the level width Γ and T<sub>1</sub> > T<sub>p</sub> ≈ T<sub>K</sub>, where T<sub>p</sub> is the position of the Kondo induced peak in the thermopower and T<sub>K</sub> is the Kondo scale. No sign change is found outside the Kondo regime, or, for weak correlations, making a sign change in S(T) a particularly sensitive signature of strong correlations and Kondo physics. For molecules, we investigate the effect of screening by conduction electrons on the thermoelectric transport. We find that a large screening interaction enhances the figure of merit in the Kondo and mixed valence regimes. Thermoelectric effects in correlated quantum dots and molecules Schöps, Volker Zlatić, Veljko Zlatić, Veljko Schöps, Volker 2011 Costi, Theodoulos A. 2022-04-11T12:31:30Z eng

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