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DOE OSTI · 1782474

Thermoelectric current in a graphene Cooper pair splitter

Tan, Z. B.·Laitinen, A.·Kirsanov, N. S.·Galda, A.·Vinokur, V. M.·Haque, M.·Savin, A.·Golubev, D. S.·Lesovik, G. B.·Hakonen, P. J.
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Abstract

Generation of electric voltage in a conductor by applying a temperature gradient is a fundamental phenomenon called the Seebeck effect. This effect and its inverse is widely exploited in diverse applications ranging from thermoelectric power generators to temperature sensing. Recently, a possibility of thermoelectricity arising from the interplay of the non-local Cooper pair splitting and the elastic co-tunneling in the hybrid normal metal-superconductor-normal metal structures was predicted. Here, we report the observation of the non-local Seebeck effect in a graphene-based Cooper pair splitting device comprising two quantum dots connected to an aluminum superconductor and present a theoretical description of this phenomenon. The observed non-local Seebeck effect offers an efficient tool for producing entangled electrons.

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Tan, Z. B., Laitinen, A., Kirsanov, N. S., Galda, A., Vinokur, V. M., Haque, M., Savin, A., Golubev, D. S., Lesovik, G. B., Hakonen, P. J.. 2021-01-08. Thermoelectric current in a graphene Cooper pair splitter. https://doi.org/10.1038/s41467-020-20476-7

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