Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1546735 | Physica E: Low-dimensional Systems and Nanostructures | 2007 | 6 Pages |
Abstract
We investigated the superconducting proximity effect in carbon nanotubes (CNTs). Reentrant behavior caused by the proximity effect was observed in a sandwich structure of network-like CNTs coupled to NbN electrodes. The proximity effect gives rise to enhanced magnetoconductance fluctuations that are similar to universal conductance fluctuation. The proximity effect correction to the conductance and fluctuation amplitude disappears at low temperature and reaches a maximum value at about 8Â K, which corresponds to Thouless energy. This reentrant behavior was also observed in the magnetic field dependance of fluctuation amplitude. We found that a correlation magnetic field of about 3Â T induces the dephasing of the interference. This high magnetic field is due to the CNTs with small diameter. We discuss this proximity effect in these quasi-one-dimensional CNTs with random network structure in experiment and theory.
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Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yuan-Liang Zhong, Hayato Nakano, Tatsushi Akazaki, Kenichi Kanzaki, Yoshihiro Kobayashi, Hideaki Takayanagi,