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arXiv · 2208.14336

Hybrid normal-superconducting Aharonov-Bohm quantum thermal device

Gianmichele Blasi·Francesco Giazotto·Géraldine Haack
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Abstract

We propose and theoretically investigate the behavior of a ballistic Aharonov-Bohm (AB) ring when embedded in a N-S two-terminal setup, consisting of a normal metal (N) and superconducting (S) leads. This device is based on available current technologie and we show in this work that it constitutes a promising hybrid quantum thermal device, as quantum heat engine and quantum thermal rectifier. Remarkably, we evidence the interplay of single-particle quantum interferences in the AB ring and of the superconducting properties of the structure to achieve the hybrid operating mode for this quantum device. Its efficiency as a quantum heat engine reaches $55\%$ of the Carnot efficiency, and we predict thermal rectification factor attaining $350\%$. These predictions make this device highly promising for future phase-coherent caloritronic nanodevices.

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Gianmichele Blasi, Francesco Giazotto, Géraldine Haack. 2022-08-30. Hybrid normal-superconducting Aharonov-Bohm quantum thermal device. https://doi.org/10.1088/2058-9565%2Facacbf

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