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Dissipation in an ultrathin superconducting single-crystal Pb nanobridge

The transport property of a superconducting Pb nanobridge, which is carved by focus ion beam technique from an atomically flat single-crystal Pb thin film grown on Si(111) substrate, is investigated. Below the superconducting transition temperature T C , the nanobridge exhibits a series of sharp vol...

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Bibliographic Details
Published in:Journal of applied physics 2009-08, Vol.106 (3), p.034301-034301-4
Main Authors: Wang, Jian, Ma, Xu-Cun, Qi, Yun, Ji, Shuai-Hua, Fu, Ying-Shuang, Lu, Li, Jin, Ai-Zi, Gu, Chang-Zhi, Xie, X. C., Tian, Ming-Liang, Jia, Jin-Feng, Xue, Qi-Kun
Format: Article
Language:English
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Summary:The transport property of a superconducting Pb nanobridge, which is carved by focus ion beam technique from an atomically flat single-crystal Pb thin film grown on Si(111) substrate, is investigated. Below the superconducting transition temperature T C , the nanobridge exhibits a series of sharp voltage steps as a function of current. The multiple voltage steps are interpreted as a consequence of spatially localized phase slip centers or hot-spot formation in the bridge. Just below the critical current, the voltages versus current curve shows a power-law behavior in the low temperature region, but Ohmic near the T C . The thermally activated phase slip, quantum phase slip, and imhomogeneity in a one-dimensional superconducting system may contribute to the observed results.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3187908