1. Boundary effect on superconductivity in long single-crystal superconducting nanowires
- Author
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Liu, Haidong, Ye, Zuxin, Luo, Zhiping, Rathnayaka, K.D.D., and Wu, Wenhao
- Subjects
- *
BOUNDARY value problems , *SUPERCONDUCTIVITY , *CRYSTALS , *NANOWIRES - Abstract
Abstract: We fabricate single-crystal Pb, Sn, and Zn nanowires, of length 6 or 60μm and diameter 30–250nm, using an in situ template-based electrochemical method. In this approach, a single nanowire is formed in contact with a pair of bulk film electrodes of Au, Sn, or Pb. We observe that, with superconducting electrodes having a higher critical temperature T c , superconductivity is induced in Sn and Zn nanowires at the T c of the electrodes for nanowires as long as 60μm. With Au electrodes, superconductivity is suppressed completely in 6μm-long nanowires and partially in 60μm-long nanowires. Based on transmission electron microscopy studies, the nanowires are single crystalline. Analysis of the temperature dependence of the normalized resistance suggests that the residual-resistance-ratio plays an important role in the observed anomalous long-range proximity effect. [Copyright &y& Elsevier]
- Published
- 2008
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