Phase-sensitive thermoelectricity and long-range Josephson effect supported by thermal gradient
Mikhail S. Kalenkov, Pavel E. Dolgirev, Andrei D. Zaikin
DOI 10.1103/PhysRevB.101.180505 · Physical Review B
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Abstract
We demonstrate that a temperature gradient can strongly stimulate the thermoelectric signal, as well as dc Josephson current, in multiterminal superconducting hybrid nanostructures. At temperatures T sufficiently exceeding the Thouless energy of our device, both the supercurrent and the thermoinduced voltage are dominated by the contribution from nonequilibrium low-energy quasiparticles and are predicted to decay slowly (algebraically rather than exponentially) with increasing T. We also predict a nontrivial 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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