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| HAL : hal-00143895, version 2 |
| arXiv : 0704.3729 |
| DOI : 10.1103/PhysRevLett.99.117002 |
| Fiche détaillée |  Récupérer au format |
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| Physical Review Letters 99 (2007) 117002 |
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| Versions disponibles : | v1 (27-04-2007) | v2 (26-10-2007) |
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| Divergence at low bias and down-mixing of the current noise in a diffusive superconductor-normal metal-superconductor junction |
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| Elsa LHOTEL 1Olivier Coupiac 1 |
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| (12/09/2007) |
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| We present current noise measurements in a long diffusive superconductor-normal-metal-superconductor junction in the low voltage regime, in which transport can be partially described in terms of coherent multiple Andreev reflections. We show that, when decreasing voltage, the current noise exhibits a strong divergence together with a broad peak. We ascribe this peak to the mixing between the ac- Josephson current and the noise of the junction itself. We show that the junction noise corresponds to the thermal noise of a nonlinear resistor 4kBT=R with R V = I V and no adjustable parameters. |
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| 1 : | Laboratoire de Transport Electronique Quantique et Supraconductivité (LATEQS) |
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CEA : DSM/INAC |
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| 2 : | Institut Néel (NEEL) |
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CNRS : UPR2940 – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG) |
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| CP |
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| Domaine | : | Physique/Matière Condensée/Systèmes mésoscopiques et effet Hall quantique |
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| shot noise – S/N/S junction – Andreev reflection – fluctuations-dissipation theorem |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00143895, version 2 | |
| http://hal.archives-ouvertes.fr/hal-00143895 | |
| oai:hal.archives-ouvertes.fr:hal-00143895 | |
| Contributeur : François Lefloch | |
| Soumis le : Jeudi 25 Octobre 2007, 10:34:58 | |
| Dernière modification le : Vendredi 25 Janvier 2008, 15:42:22 | |
