A hybrid superconducting quantum dot acting as an efficient charge and spin Seebeck diode

Abstract

We propose a highly efficient thermoelectric diode device built from the coupling of a quantum dot with a normal or ferromagnetic electrode and a superconducting reservoir. The current shows a strongly nonlinear behavior in the forward direction (positive thermal gradients) while it almost vanishes in the backward direction (negative thermal gradients). Our discussion is supported by a gauge-invariant current-conserving transport theory accounting for electron-electron interactions inside the dot. We find that the diode behavior is greatly tuned with external gate potentials, Zeeman splittings or lead magnetizations. Our results are thus relevant for the search of novel thermoelectric devices with enhanced functionalities.

arXiv comment10 pages, 4 figures

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Cited by in corpus (11)

• Thermal, electric and spin transport in superconductor/ferromagnetic-insulator structures
• Spin-dependent thermoelectric phenomena in a quantum dot attached to ferromagnetic and superconducting electrodes
• Phase-dependent heat and charge transport through superconductor-quantum dot hybrids
• Nonlocal quantum heat engines made of hybrid superconducting devices
• Odd-frequency Superconductivity Revealed by Thermopower
• Non-equilibrium thermoelectric transport across normal metal-Quantum dot-Superconductor hybrid system within the Coulomb blockade regime
• Superconductor-quantum dot hybrid coolers
• Phase and Thermal Driven Transport across T-Shaped Double Quantum Dot Josephson Junction
• Thermoelectric processes of quantum normal-superconductor interfaces
• Nonlinear electric and thermoelectric Andreev transport through a hybrid quantum dot coupled to ferromagnetic and superconducting leads
• Properties of multiterminal superconducting nanostructure with double quantum dot