1. Dissipation in an ultrathin superconducting single-crystal Pb nanobridge.
- Author
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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, and Xue, Qi-Kun
- Subjects
LEAD crystals ,SUPERCONDUCTORS ,ELECTRIC properties of thin films ,TRANSPORT theory ,SUPERCONDUCTIVITY ,NANOSILICON - Abstract
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 TC . The thermally activated phase slip, quantum phase slip, and imhomogeneity in a one-dimensional superconducting system may contribute to the observed results. [ABSTRACT FROM AUTHOR]- Published
- 2009
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