Magnon-driven quantum-dot heat engine

Abstract

We investigate a heat- to charge-current converter consisting of a single-level quantum dot coupled to two ferromagnetic metals and one ferromagnetic insulator held at different temperatures. We demonstrate that this nano engine can act as an optimal heat to spin-polarized charge current converter in an antiparallel geometry, while it acts as a heat to pure spin current converter in the parallel case. We discuss the maximal output power of the device and its efficiency.

6 pages, 4 figures, published version, selected as Editor's choice

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• Quantum-dot circuit-QED thermoelectric diodes and transistors
• Optimal quantum interference thermoelectric heat engine with edge states
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• A small quantum absorption refrigerator with reversed couplings
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• Thermoelectrics with Coulomb coupled quantum dots
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• Enhancing Thermoelectric Performance Using Nonlinear Transport Effects
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• Critical-point behavior of a measurement-based quantum heat engine
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• Magnon cotunneling through a quantum dot
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