Self-resonant modes in Josephson junctions with a phase discontinuity

• Published in: Физика низких температур
• Date: 2010
• Main Authors: Nappi, C., Adamo, M., Sarnelli, E., Goldobin, E.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2010
• Subjects: Quantum coherent effects in superconductors and normal metals
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/117517
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Self-resonant modes in Josephson junctions with a phase discontinuity / C. Nappi, M. Adamo, E. Sarnelli, E. Goldobin // Физика низких температур. — 2010. — Т. 36, № 10-11. — С. 1149–1153. — Бібліогр.: 23 назв. — англ.

We extend the theory of self-resonances in short Josephson junctions to the case of a piecewise constant critical current density and a κ discontinuity of the Josephson phase. We calculate the amplitudes of self-resonances as a function of applied magnetic field by using an extension of the approach introduced by Kulik for conventional Josephson junctions (I.O. Kulik, JETP Lett. 2,84 (1965)). The presented theory agrees with existing experiments on superconducting–insulator–ferromagnet–superconductor 0–π Josephson junctions. The results are relevant for the characterization of all modern 0–π junctions as well as 0–κ junctions with artificially created phase discontinuity: high-temperature grain boundary junctions, junctions with ferromagnetic barrier and the junction with current injectors.