Non-Local 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.

4 pages, 4 figures

References in corpus (3)

• 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

Cited by in corpus (18)

• Crossed Andreev reflection in a graphene bipolar transistor
• Reversing non-local transport through a superconductor by electromagnetic excitations
• Non-local Andreev transport through an interacting quantum dot
• Nonlocal Andreev reflection at high transmissions
• Detecting entangled states in graphene via crossed Andreev reflection
• Non-local Andreev reflection in superconducting quantum dots
• Contact resistance dependence of crossed Andreev reflection
• Full counting statistics of crossed Andreev reflection
• Self-consistent microscopic calculations for non-local transport through nanoscale superconductors
• Renormalization group study of transport through a superconducting junction of multiple one-dimensional quantum wires
• Long range crossed Andreev reflections in high Tc superconductors
• Non-local Andreev reflection under ac bias
• Nonlocal transport mediated by nonlocal Hikami boxes: Condensation of evanescent quasiparticles injected into the superconducting gap
• Observation of large $h/2e$ and $h/4e$ oscillations in a proximity dc superconducting quantum interference device
• Spin-resolved crossed Andreev reflection in ballistic heterostructures
• Circuit theory for crossed Andreev reflection and nonlocal conductance
• Non local Andreev reflection in a carbon nanotube superconducting quantum interference device
• Subgap tunneling via quantum-interference effect: insulators and charge density waves