Odd frequency Berezinski pairing and cross junction coherence in Josephson effect.

ORAL

Abstract

Odd frequency or Berezinski pairing state is now claimed to be present in multiple heterjunctions. We now demonstrate the emergence of odd-frequency pair amplitudes as a cross junction Berezinski coherence in conventional Josephson junctions. We considerate both in the absence of a voltage (DC effect) and in the presence of a finite voltage (AC effect). In both cases, we find that Berezinski interlead pairing emerges whenever a Josephson current is expected to flow. Additionally, we show that the interlead spin-susceptibility is directly influenced by the presence of the odd-frequency pair amplitudes. Specifically, we find that the spin-susceptibility is suppressed when the odd-frequency component is the largest. By establishing a novel link between the physics of Josephson junctions and Berezinski pairing, we extend the notion of Berezinski pairing to cross junction coherences and to conventional Josephson effect.

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Presenters

  • Alexander Balatsky

    Nordita, Los Alamos National Laboratory, Nordic Institute for Theoretical Physics, Stockholm, Institute for Materials Science, Los Alamos National Laboratory, NORDITA, Nordic Institute for Theoretical Physics, Los Alamos National Laboratory, Institute for Materials Science, Institute for Material Science, Los Alamos National Laboratory, Department of Physics, University of Connecticut, Storrs, CT 06269, USA

Authors

  • Alexander Balatsky

    Nordita, Los Alamos National Laboratory, Nordic Institute for Theoretical Physics, Stockholm, Institute for Materials Science, Los Alamos National Laboratory, NORDITA, Nordic Institute for Theoretical Physics, Los Alamos National Laboratory, Institute for Materials Science, Institute for Material Science, Los Alamos National Laboratory, Department of Physics, University of Connecticut, Storrs, CT 06269, USA

  • Sergey Pershoguba

    Physics, Yale University

  • Christopher Triola

    Physics, Uppsala University, Department of Physics and Astronomy, Uppsala University