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Tunneling spectroscopy of giant vorticity states in superconducting micro- and nanorings at ultra-low temperaturesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Hongisto T.T., Arutyunov K.Yu
- Журнал: Physica C: Superconductivity and its Applications
- Том: 468
- Номер: 7-10
- Год издания: 2008
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 733
- Последняя страница: 736
- DOI: 10.1016/j.physc.2007.11.038
- Аннотация: When a superconducting contour is exposed to a magnetic field screening currents are induced. At temperatures well below the critical temperature T(c) periodicity of the persistent currents can significantly exceed the superconducting flux quantum h/2e due to formation of metastable energy states with high quantum winding numbers (vorticity). We have studied the effect in normal metal-insulator-superconductor (NIS) and SIS’IS tunnel structures with the superconducting (S or S’) electrode in a shape of a loop. The tunnel current oscillates due to the modulation of the superconducting density of states by the persistent currents reaching the sub-critical values. In the limit of loops with extremely narrow linewidth the magnitude of the oscillations drops and their shape deviates from the ‘conventional’ saw-tooth behavior. The effect can be accounted to the contribution of the quantum phase slips in the ultra-narrow superconducting ring-shaped electrode. (C) 2008 Elsevier B.V. All rights reserved.
- Добавил в систему: Арутюнов Константин Юрьевич