Phase diagram of a current-carrying superconducting film in absence of the magnetic field

• Дата: 2010
• Автори: Bezuglyi, E.V., Zolochevskii, I.V.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2010
• Назва видання: Физика низких температур
• Теми: Quantum coherent effects in superconductors and normal metals
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/117527
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Phase diagram of a current-carrying superconducting film in absence of the magnetic field / E.V. Bezuglyi, I.V. Zolochevskii // Физика низких температур. — 2010. — Т. 36, № 10-11. — С. 1248–1252. — Бібліогр.: 26 назв. — англ.

It is present the phase diagram for the current states of superconducting films, based on the experimental investigation of the resistive transitions induced by the transport current. It is found that a comparatively narrow film with the width w<5λ⊥(T)(λ⊥ is the penetration depth of the magnetic field) never enters the vortex state, but experiences direct transition from the purely superconducting state to the resistive state with phase-slip centers as soon as the current exceeds the critical Ginzburg–Landau current IGLc. The Meissner current state of the films of intermediate width, 5λ⊥(T)<w<10λ⊥(T), transforms at I>0.8IGLc to the vortex resistive state which exists within the current interval 0.8IGLc<I<Im, where the value of the upper critical current is in a good agreement with the heory. The vortex state of wide films, w > 10λ⊥(T), is realized within the current region IALc<I<Im, where IALc is the transition point to the vortex state calculated for the limiting case w>>λ⊥.AtI>Im, the films with the width w>5λ⊥(T) enter a vortex-free resistive state with phase-slip lines.