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| HAL : in2p3-00734799, version 1 |
| DOI : 10.1103/PhysRevB.86.064510 |
| Fiche détaillée |  Récupérer au format |
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| Physical Review B 86 (2012) 064510 |
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| Geometry-related magnetic interference patterns in long S N S Josephson junctions |
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| F. Chiodi1M. Ferrier1S. Gueron1J. C. CuevasG. Montambaux1F. Fortuna2A. Kasumov1H. Bouchiat1 |
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| (2012) |
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| We have measured the critical current dependence on the magnetic flux of two long S N S junctions differing by the normal wire geometry. The samples are made by a Au wire connected to W contacts, via focused ion beam assisted deposition. We could tune the magnetic pattern from the monotonic Gaussian-like decay of a quasi-one-dimensional (1D) normal wire to the Fraunhofer-like pattern of a square normal wire. We explain the monotonic limit with a semiclassical 1D model, and we fit both field dependencies with numerical simulations of the two-dimensional Usadel equations. Furthermore, we observe both integer and fractional Shapiro steps. The magnetic flux dependence of the integer steps reproduces as expected that of the critical current I-c, while fractional steps decay slower with the flux than I-c. |
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| 1 : | LPS - Laboratoire de Physique des Solides |
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| 2 : | CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse |
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| CSNSM PS2 |
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| Thème(s) | : | Physique/Matière Condensée/Science des matériaux Sciences de l'ingénieur/Matériaux |
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| SUPERCONDUCTIVITY |
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| in2p3-00734799, version 1 | |
| http://hal.in2p3.fr/in2p3-00734799 | |
| oai:hal.in2p3.fr:in2p3-00734799 | |
| Contributeur : Christine Hadrossek | |
| Soumis le : Lundi 24 Septembre 2012, 15:24:21 | |
| Dernière modification le : Mardi 25 Septembre 2012, 14:20:30 | |
