Nonlocal Cooper pair Splitting in a pSn Junction

Details Nonlocal Cooper pair Splitting in a pSn Junction Nonlocal Cooper pair Splitting in a pSn Junction

2011-12-16

arxiv.org/abs/1112.3742v1

Phys. Rev. Lett. 105, 107002 (2010)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.105.107002

Perfect Cooper pair splitting is proposed, based on crossed Andreev reflection (CAR) in a p-type semiconductor - superconductor - n-type semiconductor (pSn) junction. The ideal splitting is caused by the energy filtering that is enforced by the bandstructure of the electrodes. The pSn junction is modeled by the Bogoliubov-de Gennes equations and an extension of the Blonder-Tinkham-Klapwijk theory beyond the Andreev approximation. Despite a large momentum mismatch, the CAR current is predicted to be large. The proposed straightforward experimental design and the 100% degree of pureness of the nonlocal current open the way to pSn structures as high quality sources of entanglement.

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