Nonlocal Andreev reflection at high transmissions

Abstract

We analyze non-local effects in electron transport across three-terminal normal-superconducting-normal (NSN) structures. Subgap electrons entering S-electrode from one N-metal may form Cooper pairs with their counterparts penetrating from another N-metal. This phenomenon of crossed Andreev reflection -- combined with normal scattering at SN interfaces -- yields two different contributions to non-local conductance which we evaluate non-perturbatively at arbitrary interface transmissions. Both these contributions reach their maximum values at fully transmitting interfaces and demonstrate interesting features which can be tested in future experiments.

4 pages, 4 figures

References in corpus (4)

• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
• Current-current correlations in hybrid superconducting and normal metal multiterminal structures
• Sign of the crossed conductances at a FSF double interface
• Crossed Andreev reflection in diffusive contacts

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• Non local Andreev reflection in a carbon nanotube superconducting quantum interference device
• Circuit theory for crossed Andreev reflection and nonlocal conductance
• Scattering Resonances in a Degenerate Fermi Gas
• Subgap tunneling via quantum-interference effect: insulators and charge density waves