Nonequilibrium Phenomena in Planar Mesoscopic Josephson SNS Structures Based on Superconducting Nb

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Abstract

Nonequilibrium phenomena in planar Josephson SNS nanostructures, where the superconductor (S) is Nb and the normal metal (N) is Cu or Au, have been studied experimentally. Using additional N electrodes attached to the S banks of the Josephson SNS junction, transport measurements have been performed at low temperatures with the injection of quasiparticles with the use of local and nonlocal connection schemes. The charge-imbalance relaxation length in niobium at temperatures much lower than the superconducting transition temperature has been determined experimentally for the first time.

About the authors

I. S. Lakunov

Osipyan Institute of Solid State Physics, Russian Academy of Sciences

Email: lakunov.ivan@mail.ru
142432, Chernogolovka, Moscow region, Russia

S. V. Egorov

Osipyan Institute of Solid State Physics, Russian Academy of Sciences; Russian Quantum Center

Email: lakunov.ivan@mail.ru
142432, Chernogolovka, Moscow region, Russia; 121205, Skolkovo, Moscow, Russia

E. D. Mukhanova

Osipyan Institute of Solid State Physics, Russian Academy of Sciences

Email: lakunov.ivan@mail.ru
142432, Chernogolovka, Moscow region, Russia

I. E. Batov

Osipyan Institute of Solid State Physics, Russian Academy of Sciences; Faculty of Physics, HSE University

Email: lakunov.ivan@mail.ru
142432, Chernogolovka, Moscow region, Russia; 101000, Moscow, Russia

T. E. Golikova

Osipyan Institute of Solid State Physics, Russian Academy of Sciences

Email: golt2@list.ru
142432, Chernogolovka, Moscow region, Russia

V. V. Ryazanov

Osipyan Institute of Solid State Physics, Russian Academy of Sciences; Faculty of Physics, HSE University

Author for correspondence.
Email: golt2@list.ru
142432, Chernogolovka, Moscow region, Russia; 101000, Moscow, Russia

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