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

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Asano, Yasuhiro and Tanaka, Yukio and Golubov, Alexander A. (2007) Josephson Effect due to Odd-Frequency Pairs in Diffusive Half Metals. Physical Review Letters, 98 (10). p. 107002. ISSN 0031-9007

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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.
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Copyright:© 2007 American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/59111
Official URL:http://dx.doi.org/10.1103/PhysRevLett.98.107002
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Metis ID: 242657