Topology-controlled thermopower oscillations in multiterminal Andreev interferometers

Abstract

We theoretically investigate coherent oscillations of the thermopower $\mathcal{S}$ as a function of the magnetic flux $\Phi$ in six-terminal Andreev interferometers. We demonstrate that the thermopower behavior is determined by a number of contributions originating from the Josephson-like 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 $\mathcal{S}(\Phi )$.

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• Phase coherent electron transport in asymmetric cross-like Andreev interferometers
• Phase-coherent thermoelectricity and non-equilibrium Josephson current in Andreev interferometers
• Phase-coherent thermoelectricity in superconducting hybrids (Brief Review)
• Anomalous Andreev interferometer: Study of an anomalous Josephson junction coupled to a normal wire