1. Superconducting Nanoelectronics Laboratory, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Minin Street, 24, 603155 Nizhny Novgorod, Russia
2. Institute for Physics of Microstructures of the Russian Academy of Sciences, Academicheskaya Street, 7, 603950 Nizhny Novgorod, Russia