Spin-dependent thermoelectric phenomena in a quantum dot attached to ferromagnetic and superconducting electrodes

Abstract

We investigate transport and thermoelectric properties of hybrid systems based on a single-level quantum dot and one superconducting lead. The other lead is generally normal-metallic ferromagnet. In the latter case single-particle transport is spin-polarized. Our main interest is in the interplay of Andreev tunneling of Cooper pairs and single-particle tunneling. The latter is responsible for relatively large thermopower and figure of merit due to a diverging density of single-particle states at the superconducting gap edges. System with ferromagnetic and superconducting leads can also reveal spin thermoelectric phenomena. Finite superconducting gap is considered within the BCS theory, and the thermoelectric coefficients are calculated by means of nonequilibrium Green's function technique within Hartree-Fock like approximation with respect to the intradot Coulomb interaction.

11 pages, 8 figures

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Cited by in corpus (10)

• Nonlocal thermoelectricity in a Cooper-pair splitter
• Thermopower and thermal conductance of a superconducting quantum point contact
• Generalized atomic limit of a double quantum dot coupled to superconducting leads
• Spin-dependent heat signatures of single-molecule spin dynamics
• Non-equilibrium thermoelectric transport across normal metal-Quantum dot-Superconductor hybrid system within the Coulomb blockade regime
• Phase and Thermal Driven Transport across T-Shaped Double Quantum Dot Josephson Junction
• Thermoelectric processes of quantum normal-superconductor interfaces
• Thermoelectric inversion in a resonant quantum dot-cavity system in the steady-state regime
• Nonlinear electric and thermoelectric Andreev transport through a hybrid quantum dot coupled to ferromagnetic and superconducting leads
• Fano effect in a thermally induced transport through a triple quantum dot within the Coulomb blockade regime