Topology-Controlled Thermopower Oscillations in Multiterminal Andreev Interferometers

Physica Status Solidi - Rapid Research Letters. 2019. Vol. 13. No. 1. P. 1800252-1–1800252-5.

Dolgirev P. E., Kalenkov M. S., Zaikin Andrei D.

We theoretically investigate coherent oscillations of the thermopower S as a function of the magnetic flux Ф in six-terminal Andreev interferometers. We demonstrate that the thermopower behavior is determined by a number of
contributions originating from the Josephson- and Aharonov–Bohm-like effects as well as from electron–hole asymmetry. The relative weight of these contributions depends on the relation between temperature, voltage bias, and
an effective Thouless energy of our setup. We particularly emphasize the role of the system topology that may have a dramatic impact on the behavior of S(Ф).

Keywords: эффект Джозефсона, Aharonov-Bohm Effect, Josephson effect, неравновесная сверхпроводимость, proximity effect, nonequilibrium superconductivity, thermoelectric effect, Andreev interferometer, эффект близости, термоэлектрический эффект, эффект Аронова-Бома, Андреевский интерферометр