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arXiv · 1806.04569

Nonlocal thermoelectricity in a Cooper-pair splitter

Robert Hussein·Michele Governale·Sigmund Kohler·Wolfgang Belzig·Francesco Giazotto·Alessandro Braggio
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Abstract

We investigate the nonlocal thermoelectric transport in a Cooper-pair splitter based on a double-quantum-dot-superconductor three-terminal hybrid structure. We find that the nonlocal coupling between the superconductor and the quantum dots gives rise to nonlocal thermoelectric effects which originate from the nonlocal particle-hole breaking of the system. We show that Cooper-pair splitting induces the generation of a thermo-current in the superconducting lead without any transfer of charge between the two normal metal leads. Conversely, we show that a nonlocal heat exchange between the normal leads is mediated by non-local Andreev reflection. We discuss the influence of finite Coulomb interaction and study under which conditions nonlocal power generation becomes possible, and when the Cooper-pair splitter can be employed as a cooling device.

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Robert Hussein, Michele Governale, Sigmund Kohler, Wolfgang Belzig, Francesco Giazotto, Alessandro Braggio. 2019-02-07. Nonlocal thermoelectricity in a Cooper-pair splitter. https://doi.org/10.1103/physrevb.99.075429

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