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Andreev reflexion at nanocontacts of superconducting AuIn2 with copper

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Zeitschrift für Physik B Condensed Matter

Abstract

We investigated superconducting AuIn2 by point-contact spectroscopy. Andreev reflexion was observed with nearly full excess current at contact sizes down to 0.15 nm. This implies, together with a large superconducting coherence length of 11 μm, almost ideal retroreflectivity. At the onset of lateral confinement of the ballistic electrons the Andreev-derived spectra broaden dramatically due to inelastic scattering at defects or the strain field near the contact. Lateral confinement does not suppress Andreev reflexion.

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  1. SFB 252, Institut für Festkörperphysik, Technische Hochschule Darmstadt, D-64289, Darmstadt, Germany

    K. Gloos & F. Martin

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  1. K. Gloos
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  2. F. Martin
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Gloos, K., Martin, F. Andreev reflexion at nanocontacts of superconducting AuIn2 with copper. Z. Phys. B - Condensed Matter 99, 321–325 (1995). https://doi.org/10.1007/BF02769948

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  • DOI: https://doi.org/10.1007/BF02769948

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