Numerical model of crossed Andreev reflection and charge imbalance

We present a numerical model of local and nonlocal transport properties in a lateral spin valve structure consisting of two magnetic electrodes in contact with a third perpendicular superconducting electrode. By considering the transport paths for a single electron incident at the local F/S interfac...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-08, Vol.86 (5), Article 054525
Main Authors: Webb, J. L., Hickey, B. J., Burnell, G.
Format: Article
Language:English
Subjects:
Aluminum
Charge
Condensed matter
Electrodes
Mathematical models
Reflection
Spin valves
Superconductivity
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Summary:We present a numerical model of local and nonlocal transport properties in a lateral spin valve structure consisting of two magnetic electrodes in contact with a third perpendicular superconducting electrode. By considering the transport paths for a single electron incident at the local F/S interface-in terms of probabilities of crossed or local Andreev reflection, elastic cotunneling, or quasiparticle transport-we show that this leads to nonlocal charge imbalance. We compare this model with experimental data from an aluminum-permalloy (Al/Py) lateral spin valve geometry device and demonstrate the effectiveness of this simple approach in replicating experimental behavior.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.86.054525