Nonlocal correlations in a proximity-coupled normal-metal

Taewan Noh*, Sam Davis, Venkat Chandrasekhar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We report evidence of large, nonlocal correlations between two spatially separated normal-metals in superconductor/normal-metal (SN) heterostructures, which manifest themselves as nonlocal voltage generated in response to a driving current. Unlike prior experiments in SN heterostructures, the nonlocal correlations are mediated not by a superconductor, but by a proximity-coupled normal-metal. The nonlocal correlations extend over relatively long length scales in comparison to the superconducting case. At very low temperatures, we find a reduction in the nonlocal voltage for small applied currents that cannot be explained by the quasiclassical theory of superconductivity, which we believe is a signature of new long-range quantum correlations in the system.

Original languageEnglish (US)
Article number024502
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
StatePublished - Jul 8 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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