Josephson phi-junctions based on structures with complex normal/ferromagnet bilayer

S.V. Bakurskiy, N.V. Klenov, T. Karminskaya, T. Karminskaya, M..Y. Kupriyanov, Alexandre Avraamovitch Golubov

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27 Citations (Scopus)

Abstract

We demonstrate that Josephson devices with a nontrivial phase difference 0 < phivg < π in the ground state can be realized in structures composed of longitudinally oriented normal metal (N) and ferromagnet (F) films in the weak link region. Oscillatory coupling across the F-layer makes the first harmonic in the current–phase relation relatively small, while coupling across the N-layer provides a negative sign of the second harmonic. To derive quantitative criteria for a phiv-junction, we have solved the two-dimensional boundary-value problem in the frame of Usadel equations for overlap and ramp geometries of S–NF–S structures. Our numerical estimates show that phiv-junctions can be fabricated using up-to-date technology.
Original languageUndefined
Article number015005
Pages (from-to)015005-1-015005-15
Number of pages15
JournalSuperconductor science and technology
Volume26
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • IR-88876
  • METIS-301475

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