ИСТИНА

A nonlocal supercurrent was observed in mesoscopic planar SNS Josephson junctions with additional normal-metal electrodes, where nonequilibrium quasiparticles were injected from a normal-metal electrode into one of the superconducting banks of the Josephson junction. We claim that the observed effect is due to a supercurrent counterflow, appearing to compensate for the quasiparticle flow in the SNS weak link. We have measured the responses of SNS junctions for different distances between the quasiparticle injector and the SNS junction in the temperature range from the superconducting transition temperature to 0.3 K. We investigated the wide range of geometric parameters of the system to find the most suitable for the nonlocal current to be observed. The charge-imbalance relaxation length of about 4 mkm was estimated by using a modified Kadin, Smith, and Skocpol scheme in the case of a planar geometry. The model developed allows us to describe the interplay of charge imbalance and Josephson effects in the nanoscale proximity system in detail [1]. Current work is a continuation of [2]. The work was supported by grant of the Russian Scientific Foundation (14-1201290). [1] D.S. Lvov, Master thesis, http://www.issp.ac.ru/kafedra/thesis/2016/master/Lvov.pdf [2] T. E. Golikova, M. J.Wolf, D. Beckmann, I. E. Batov, I. V. Bobkova, A.M. Bobkov, and V. V. Ryazanov Phys. Rev. B. 89, 104507 (2014).