Two-stage dissipation in a superconducting microbridge: experiment and modeling
Using fluorescent microthermal imaging we have investigated the origin of 'two-step' behavior in I--V curves for a current-carrying YBa2Cu3Ox superconducting bridge. High resolution temperature maps reveal that as the applied current increases the first step in the voltage corresponds to l...
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| Veröffentlicht in: | Superconductor science & technology 2010-08, Vol.23 (8), p.085005-085005 |
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| container_end_page | 085005 |
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| container_issue | 8 |
| container_start_page | 085005 |
| container_title | Superconductor science & technology |
| container_volume | 23 |
| creator | Del Río, L Altshuler, E Niratisairak, S Haugen, Ø Johansen, T H Davidson, B A Testa, G Sarnelli, E |
| description | Using fluorescent microthermal imaging we have investigated the origin of 'two-step' behavior in I--V curves for a current-carrying YBa2Cu3Ox superconducting bridge. High resolution temperature maps reveal that as the applied current increases the first step in the voltage corresponds to local dissipation (hot spot), whereas the second step is associated with the onset of global dissipation throughout the entire bridge. A quantitative explanation of the experimental results is provided by a simple model for an inhomogeneous superconductor, assuming that the hot spot nucleates at a location with slightly depressed superconducting properties. |
| doi_str_mv | 10.1088/0953-2048/23/8/085005 |
| format | Article |
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| ispartof | Superconductor science & technology, 2010-08, Vol.23 (8), p.085005-085005 |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties COPPER OXIDE Dissipation Electric potential Exact sciences and technology Hot spots MICRO ORGANISMS Microorganisms Origins Physics Properties of type I and type II superconductors SUPERCONDUCTIVITY SUPERCONDUCTORS Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) VOLTAGE YTTRIUM OXIDE |
| title | Two-stage dissipation in a superconducting microbridge: experiment and modeling |
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