Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 15: Focussed Session: Geometry- and Topology-Controlled Nanoarchitectures I

HL 15.6: Talk

Tuesday, March 13, 2018, 10:45–11:15, EW 015

Non-equilibrium φ₀-junction-like behavior of multi-terminal Andreev interferometers — Pavel Dolgirev^1,2, Mikhail Kalenkov², and •Andrei Zaikin^3,2 — 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 I_S(φ) resembles that of a φ₀-junction differing from the latter due to a non-zero average I₀(V) = <I_S(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.