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Fluctuation effects in superconducting nanostrips | A. Engel
; A.D. Semenov
; H.-W. Huebers
; K. Il’in
; M. Siegel
; | Date: |
1 Nov 2004 | Subject: | Superconductivity | cond-mat.supr-con | Affiliation: | 1 and 2), A.D. Semenov , H.-W. Huebers , K. Il’in , M. Siegel ( Physics Institute, University of Zurich, Switzerland, DLR Institute of Planetary Research, Berlin, Germany, Institute of Micro- and Nano-Electronic Systems, University of Karlsruh | Abstract: | Superconducting fluctuations in long and narrow strips made from ultrathin NbN films, have been investigated. For large bias currents close to the critical current fluctuations led to localized, temporary transitions into the normal conducting state, which were detected as voltage transients developing between the strip ends. We present models based on fluctuations in the Cooper pair density and current-assisted thermal-unbinding of vortex-antivortex pairs, which explain the current and temperature dependence of the experimental fluctuation rates. | Source: | arXiv, cond-mat/0411033 | Services: | Forum | Review | PDF | Favorites |
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