Protected 0-π states in SIsFS junctions for Josephson memory and logic

S.V. Bakurskiy, N.V. Klenov, I.I. Soloviev, N.G. Pugach, M. Yu Kupriyanov, A.A. Golubov* (Corresponding Author)

*Corresponding author for this work

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Abstract

We study the peculiarities in current-phase relations (CPR) of the SIsFS junction in the region of 0 to π transition. These CPR consist of two independent branches corresponding to 0- and π-states of the contact. We have found that depending on the transparency of the SIs tunnel barrier, the decrease in the s-layer thickness leads to transformation of the CPR shape going in the two possible ways: either one of the branches exists only in discrete intervals of the phase difference φ or both branches are sinusoidal but differ in the magnitude of their critical currents. We demonstrate that the difference can be as large as 10% under maintaining superconductivity in the s layer. An applicability of these phenomena for memory and logic application is discussed.

Original languageEnglish
Article number082602
JournalApplied physics letters
Volume113
Issue number8
Early online date1 Aug 2018
DOIs
Publication statusPublished - 20 Aug 2018

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    Bakurskiy, S. V., Klenov, N. V., Soloviev, I. I., Pugach, N. G., Kupriyanov, M. Y., & Golubov, A. A. (2018). Protected 0-π states in SIsFS junctions for Josephson memory and logic. Applied physics letters, 113(8), [082602]. https://doi.org/10.1063/1.5045490