Josephson Effect due to Odd-Frequency Pairts in Diffusive Half Metals

Yasuhiro Asano, Yukio Tanaka, Alexandre Avraamovitch Golubov

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Abstract

Motivated by a recent experiment [Keizer et al., Nature (London) 439, 825 (2006)], we study the Josephson effect in superconductor/diffusive half metal/superconductor junctions using the recursive Green function method. The spin-flip scattering at the junction interfaces opens the Josephson channel of the odd-frequency spin-triplet Cooper pairs. As a consequence, the local density of states in a half metal has a large peak at the Fermi energy. Therefore the odd-frequency pairs can be detected experimentally by using the scanning tunneling spectroscopy.
Original languageUndefined
Pages (from-to)107002-
JournalPhysical review letters
Volume98
Issue number10
DOIs
Publication statusPublished - 2007

Keywords

  • IR-59111
  • METIS-242657

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