Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 15: Focussed Session: Geometry- and Topology-Controlled Nanoarchitectures I
HL 15.6: Vortrag
Dienstag, 13. März 2018, 10:45–11:15, EW 015
Non-equilibrium φ0-junction-like behavior of multi-terminal Andreev interferometers — Pavel Dolgirev1,2, Mikhail Kalenkov2, and •Andrei Zaikin3,2 — 1Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, 3 Nobel St., 143026 Moscow, Russia — 2I.E. Tamm Department of Theoretical Physics, P.N. Lebedev Physical Institute, 119991 Moscow, Russia — 3Institut fuer Nanotechnologie, Karlsruher Institut fuer Technologie (KIT), 76021 Karlsruhe, Germany
We predict a novel (I0,φ0)-junction state of multi-terminal hybrid superconducting-normal nanostructures with non-trivial topology. This state emerges from an interplay between long-range quantum coherence and non-equilibrium effects. Under non-zero bias V the current-phase relation IS(φ) resembles that of a φ0-junction differing from the latter due to a non-zero average I0(V) = <IS(φ)>φ. The flux-dependent thermopower S(Φ) of the system exhibits features similar to those of a (I0,φ0)-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.