Spin-dependent thermoelectric effects in a strongly correlated double quantum dot

Abstract

We investigate spin-dependent thermoelectric transport through a system of two coupled quantum dots attached to reservoirs of spin-polarized electrons. Generally, we focus on the strongly correlated regime of transport. To this end, a slave-boson method for finite $U$ is employed. Our main goal is to show that, apart from complex low-temperature physics, such a basic multilevel system provides a possibility to examine various quantum interference effects, with particular emphasis put on the influence of such phenomena on thermoelectric transport. Apart from the influence of interference effects on spin-degenerate charge transport, we show how spin-dependent transport, induced by ferromagnetic leads, can be modified as well. Finally, we also consider the case where the spin-relaxation time in the ferromagnetic leads is relatively long, which leads to the so-called spin thermoelectric effects.

arXiv comment14 pages, 13 figures

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Cited by in corpus (14)

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• Spin-dependent thermoelectric phenomena in a quantum dot attached to ferromagnetic and superconducting electrodes
• Spin-Seebeck effect and spin polarization in a multiple quantum dot molecule
• Fano-Andreev effect in T-shape double-quantum-dot in the Kondo regime
• Spin-dependent heat signatures of single-molecule spin dynamics
• Level anticrossing effect in single-level or multilevel double quantum dots: Electrical conductance, zero-frequency charge susceptibility and Seebeck coefficient
• Thermoelectric properties of a quantum dot coupled to magnetic leads by Rashba spin-orbit interaction
• Analytic treatment of the thermoelectric properties for two coupled quantum dots threaded by magnetic fields
• Intra- and inter-shell Kondo effects in carbon nanotube quantum dots
• Dark states in spin-polarized transport through triple quantum dot molecules
• Thermally induced charge current through long molecules
• Length-dependent Seebeck effect in single-molecule junctions beyond linear response regime
• On the competition between the Kondo effect and the exchange interaction in a parallel double quantum dot system
• Fano effect in a thermally induced transport through a triple quantum dot within the Coulomb blockade regime