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arXiv · 1109.3770

Phonon-drag induced suppression of the Andreev hole current in superconducting niobium contacts

Kurt Gloos·Jouko Huupponen·Elina Tuuli
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Abstract

We have investigated how the Andreev-reflection hole current at ballistic point contacts responds to a large bias voltage. Its strong suppression could be explained by the drag excerted by the non-equilibrium phonon wind generated by high-energy electrons flowing through the contact. The hole - phonon interaction leads to scattering lengths of the low-energetic holes down to 100\,nm, thereby destroying the coherent retracing of the electron path by the Andreev-reflected holes.

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Kurt Gloos, Jouko Huupponen, Elina Tuuli. 2011-09-17. Phonon-drag induced suppression of the Andreev hole current in superconducting niobium contacts. https://doi.org/10.1088/1742-6596/400/4/042010

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