Quasiparticle density of states in a half metal in the presence of odd-frequency Cooper pairs

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Asano, Yasuhiro and Yokoyama, Takehito and Tanaka, Yukio and Golubov, Alexander A. (2008) Quasiparticle density of states in a half metal in the presence of odd-frequency Cooper pairs. Physica Status Solidi A: Applied research, 205 (5). pp. 1023-1025. ISSN 0031-8965

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Abstract:We study the local density of states in a half metal sandwiched by the two superconductors. The spin-flip scattering at the junction interface opens the Josephson channels of the odd-frequency spin-triplet s-wave Cooper pairs. The penetration of the odd-frequency pairs enhances the quasiparticle density of states near the Fermi energy in a half metal, which is responsible for the unusual nonmonotonic temperature dependence of the Josephson current. On the basis of calculated results, we propose experiments to confirm the odd-frequency Cooper pairs.
Item Type:Article
Copyright:© 2008 Wiley
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/72562
Official URL:http://dx.doi.org/10.1002/pssa.200776451
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