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Proximity Effect and Multiple Andreev Reflections in Gold Atomic Contacts

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2001

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Naveh, Yehuda
Devoret, Michel H.
Esteve, Daniel
Urbina, Cristián

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Physical Review Letters. 2001, 86(2), pp. 284-287. Available under: doi: 10.1103/PhysRevLett.86.284

Zusammenfassung

We investigate the electronic transport properties of gold point contacts with superconducting aluminum leads. The modifications induced by the proximity effect in the quasiparticle density of states at the contact region are measured by tunnel spectroscopy. The theory of transport through multiple Andreev reflections is extended to incorporate these effects and used to determine the number and transmission coefficients of the conduction channels in the contact regime. We find that the smallest contacts, formed by one gold atom between the electrodes, contribute one single channel to the transport with variable transmission T between 0.1 and 1.

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ISO 690SCHEER, Elke, Wolfgang BELZIG, Yehuda NAVEH, Michel H. DEVORET, Daniel ESTEVE, Cristián URBINA, 2001. Proximity Effect and Multiple Andreev Reflections in Gold Atomic Contacts. In: Physical Review Letters. 2001, 86(2), pp. 284-287. Available under: doi: 10.1103/PhysRevLett.86.284
BibTex
@article{Scheer2001Proxi-9417,
  year={2001},
  doi={10.1103/PhysRevLett.86.284},
  title={Proximity Effect and Multiple Andreev Reflections in Gold Atomic Contacts},
  number={2},
  volume={86},
  journal={Physical Review Letters},
  pages={284--287},
  author={Scheer, Elke and Belzig, Wolfgang and Naveh, Yehuda and Devoret, Michel H. and Esteve, Daniel and Urbina, Cristián}
}
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