Phys. Rev. Lett. 98, 107002 (2007) [4 pages]Josephson Effect due to Odd-Frequency Pairs in Diffusive Half MetalsReceived 21 September 2006; published 8 March 2007 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.107002
DOI:
10.1103/PhysRevLett.98.107002
PACS:
74.50.+r, 74.25.Fy, 74.70.Tx
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