Semiconductor-superconductor transition and magnetoresistance terraces in an ultrathin superconducting Pb nanobridge

Using focused ion beam etching technique, the authors fabricated a 28 atomic monolayers thick, 500 nm wide, and 10   μ m long Pb nanobridge from an atomically flat Pb thin film grown on Si by molecular beam epitaxy. Electric transport measurements show exotic resistance oscillations in the supercond...

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Bibliographic Details
Published in:Journal of vacuum science & technology. B, Microelectronics and nanometer structures processing, measurement and phenomena Microelectronics and nanometer structures processing, measurement and phenomena, 2010-07, Vol.28 (4), p.678-681
Main Authors: Wang, Jian, Jia, Jin-Feng, Ma, Xu-Cun, Shen, Quan-Tong, Han, Tie-Zhu, Jin, Ai-Zi, Lu, Li, Gu, Chang-Zhi, Tian, Ming-Liang, Xie, X. C., Xue, Qi-Kun
Format: Article
Language:English
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Summary:Using focused ion beam etching technique, the authors fabricated a 28 atomic monolayers thick, 500 nm wide, and 10   μ m long Pb nanobridge from an atomically flat Pb thin film grown on Si by molecular beam epitaxy. Electric transport measurements show exotic resistance oscillations in the superconducting state far below its critical field H C and cascading terraces near the superconducting transition region. Furthermore, the bridge shows an unusual semiconducting behavior above the superconducting transition temperature T C . The results are in contrast to those observed in its counterpart of the two-dimensional thin film.
ISSN:1071-1023
2166-2746
1520-8567
2166-2754
DOI:10.1116/1.3437016