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arXiv · 1912.03834

Phase-sensitive thermoelectricity and long-range Josephson effect supported by thermal gradient

Mikhail S. Kalenkov·Pavel E. Dolgirev·Andrei D. Zaikin
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Abstract

We demonstrate that thermoelectric signal as well as dc Josephson current may be severely enhanced in multi-terminal superconducting hybrid nanostructures exposed to a temperature gradient. At temperatures $T$ strongly exceeding the Thouless energy of our device both the supercurrent and the thermo-induced voltage are dominated by the contribution from non-equilibrium low energy quasiparticles and are predicted to decay slowly (algebraically rather than exponentially) with increasing $T$. We also predict a non-trivial current-phase relation and a transition to a $π$-junction state controlled by both the temperature gradient and the system topology. All these features are simultaneously observable in the same experiment.

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Mikhail S. Kalenkov, Pavel E. Dolgirev, Andrei D. Zaikin. 2019-12-09. Phase-sensitive thermoelectricity and long-range Josephson effect supported by thermal gradient. https://doi.org/10.1103/physrevb.101.180505

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