Локальные и интегральные свойства квазиодномерного сверхпроводника в режиме квантовых флуктуаций параметра порядка

Физика твердого тела. 2021. Т. 63. № 9. С. 1233–1237.

Arutyunov K., Лехтинен Я. С., Trefilov D., Радкевич A. A., Semenov A. G., Заикин А. Д.

Utilization of of superconducting materials for new-generation nanoelectronic devices seems
extremely tempting because of the absence of energy dissipation during the electric current flow. However, in
small systems, the role of fluctuations can be highly important. In this study, the transport properties of thin
superconducting titanium nanoribbons have been experimentally and theoretically investigated. It has been
shown that quantum fluctuations of the order parameter differently affect the integral and local characteristics
of a quasi-one-dimensional superconductor. In sufficiently thin nanowires, a finite electrical resistance
can be observed at lowest temperatures, while the tunneling I–V characteristics only exhibit slightly diffuse
gap features and a finite Josephson current. The phenomenon is of fundamental importance for mesoscopic
superconductivity and should be taken into account when designing cryoelectronic nanodevices.

Keywords: mesoscopic superconductivity, quantum fluctuations, мезоскопическая сверхпроводимость, Квантовые флуктуации, tunnel contact, туннельные контакты

Publication based on the results of: Квантовые эффекты в низкоразмерных гибридных наноструктурах (2022)