Experimental Evidence for Crossed Andreev Reflection

Details Experimental Evidence for Crossed Andreev Reflection Experimental Evidence for Crossed Andreev Reflection

2005-12-19

arxiv.org/abs/cond-mat/0512445v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

LT24 conference proceeding, 2 pages, 2 figures

Scientific paper

10.1063/1.2354983

We report on electronic transport properties of mesoscopic superconductor-ferromagnet spin-valve structures. Two ferromagnetic iron leads form planar tunnel contacts to a superconducting aluminum wire, where the distance of the two contacts is of the order of the coherence length of the aluminum. We observe a negative non-local resistance which can be explained by crossed Andreev reflection, a process where an electron incident from one of the leads gets reflected as a hole into the other, thereby creating a pair of spatially separated, entangled particles.

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