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arXiv · 1711.05531

Current-phase relation and flux-dependent thermoelectricity in Andreev interferometers

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

We predict a novel $(I_0,ϕ_0)$-junction state of multi-terminal Andreev interferometers that emerges from an interplay between long-range quantum coherence and non-equilibrium effects. Under non-zero bias $V$ the current-phase relation $I_S(ϕ)$ resembles that of a $ϕ_0$-junction differing from the latter due to a non-zero average $I_0(V) = \left< I_S(ϕ)\right>_ϕ$. The flux-dependent thermopower ${\mathcal S}(Φ)$ of the system exhibits features similar to those of a $(I_0,ϕ_0)$-junction and in certain limits it can reduce to either odd or even function of $Φ$ in the agreement with a number of experimental observations.

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Pavel E. Dolgirev, Mikhail S. Kalenkov, Andrei D. Zaikin. 2018-01-21. Current-phase relation and flux-dependent thermoelectricity in Andreev interferometers. https://doi.org/10.1103/physrevb.97.054521

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