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

Physical Review B: Condensed Matter and Materials Physics. 2020. Vol. 101. No. 18. P. 180505-1–180505-5.

Kalenkov M. S., Dolgirev P. E., Zaikin A.

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.

Keywords: эффект Джозефсона, Josephson effect, неравновесная сверхпроводимость, Non-equilibrium superconductivity, квантовая когерентность, quantum coherence, thermoelectric effect, термоэлектрический эффект