Non-local electron transport and cross-resistance peak in NSN heterostructures

Abstract

We develop a microscopic theory describing the peak in the temperature dependence of the non-local resistance of three-terminal NSN devices. This peak emerges at sufficiently high temperatures as a result of a competition between quasiparticle/charge imbalance and subgap (Andreev) contributions to the conductance matrix. Both the height and the shape of this peak demonstrate the power law dependence on the superconductor thickness $L$ in contrast to the zero-temperature non-local resistance which decays (roughly) exponentially with increasing $L$. A similar behavior was observed in recent experiments.

4 pages, 3 figures

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Cited by in corpus (9)

• Crossed Andreev reflection and charge imbalance in diffusive NSN structures
• Positive current cross-correlations in a highly transparent normal-superconducting beam splitter due to synchronized Andreev and inverse Andreev reflections
• Self-consistent microscopic calculations for non-local transport through nanoscale superconductors
• Non-local Andreev reflection under ac bias
• Nonlocal transport through multiterminal diffusive superconducting nanostructures
• Cooper pair splitting in a nanoSQUID geometry at high transparency
• Nonlocal transport and heating in superconductors under dual-bias conditions
• Non-local spin-sensitive electron transport in diffusive proximity heterostructures
• Crossed Andreev reflection and spin-resolved non-local electron transport