Nonlocal correlations in normal-metal superconducting systems

P. Cadden-Zimansky; V. Chandrasekhar

doi:10.1103/PhysRevLett.97.237003

Nonlocal correlations in normal-metal superconducting systems

P. Cadden-Zimansky^*, V. Chandrasekhar

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

146 Scopus citations

Abstract

We examine nonlocal effects between normal-metal gold probes connected by superconducting aluminum. For highly transparent Au/Al interfaces, we find nonlocal voltages that obey a spatial and temperature evolution distinct from the nonequilibrium charge imbalance signals usually found in such systems. These voltages are consistent with the predicted effects of crossed Andreev reflection and elastic cotunneling, effects that involve coherent correlations between spatially separated electrons.

Original language	English (US)
Article number	237003
Journal	Physical review letters
Volume	97
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.97.237003
State	Published - 2006

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Nonlocal correlations in normal-metal superconducting systems",

abstract = "We examine nonlocal effects between normal-metal gold probes connected by superconducting aluminum. For highly transparent Au/Al interfaces, we find nonlocal voltages that obey a spatial and temperature evolution distinct from the nonequilibrium charge imbalance signals usually found in such systems. These voltages are consistent with the predicted effects of crossed Andreev reflection and elastic cotunneling, effects that involve coherent correlations between spatially separated electrons.",

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AB - We examine nonlocal effects between normal-metal gold probes connected by superconducting aluminum. For highly transparent Au/Al interfaces, we find nonlocal voltages that obey a spatial and temperature evolution distinct from the nonequilibrium charge imbalance signals usually found in such systems. These voltages are consistent with the predicted effects of crossed Andreev reflection and elastic cotunneling, effects that involve coherent correlations between spatially separated electrons.

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Nonlocal correlations in normal-metal superconducting systems

Abstract

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