Negative four-terminal resistance as a probe of crossed Andreev reflection

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We report on the experimental investigation of electronic transport in superconductor-ferromagnet spin-valve structures. Our samples consist of two ferromagnetic iron leads forming planar tunnel contacts to a superconducting aluminum wire. At energies below the superconducting gap, we observe a negative four-probe resistance that can be explained by crossed Andreev reflection.
4 pages, 5 figures, revtex

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/116102

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0609766
 http://arxiv.org/abs/cond-mat/0609766

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arXiv