Theory of supercurrent transport in SIsFS Josephson junctions

Bakurskiy, S.V.; Klenov, N.V.; Soloviev, I.I.; Kupriyanov, M.Y.; Golubov, A.A.

Статья опубликована в высокорейтинговом журнале

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: 6 февраля 2014 г.

Авторы: Bakurskiy S.V., Klenov N.V., Soloviev I.I., Kupriyanov M.Yu, Golubov A.A.
Журнал: Physical Review B
Том: 88
Номер: 14
Год издания: 2013
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 144519-1
Последняя страница: 144519-13
DOI: 10.1103/PhysRevB.88.144519
Аннотация: We present the results of a theoretical study of current-phase relations (CPRs) JS(φ) in Josephson junctions of SIsFS type, where S is a bulk superconductor and IsF is a complex weak link consisting of a superconducting film s, a metallic ferromagnet F, and an insulating barrier I. At temperatures close to critical, T≲TC, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures a numerical method is developed to solve self-consistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes, which is caused by shifting the location of a weak link from the tunnel barrier I to the F layer. We show that strong deviations of the CPR from sinusoidal shape occur even in the vicinity of TC, and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and π states in the contact and show that the smoothness of this transition strongly depends on the CPR shape.
Добавил в систему: Куприянов Михаил Юрьевич

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Theory of supercurrent transport in SIsFS Josephson junctionsстатья

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