Josephson Effect in MgB2 : Large Ic RN Product and Superconducting Energy Gap
XUAN Yi, LI Zhuang-Zhi, TAO Hong-Jie, REN Zhi-An, CHE Guang-Can, ZHAO Bai-Ru, ZHAO Zhong-Xian
National Laboratory for Superconductivity, Institute of
Physics and Center for Condensed Mater Physics, Chinese Academy of Sciences, Beijing 100080
Josephson Effect in MgB2 : Large Ic RN Product and Superconducting Energy Gap
XUAN Yi;LI Zhuang-Zhi;TAO Hong-Jie;REN Zhi-An;CHE Guang-Can;ZHAO Bai-Ru;ZHAO Zhong-Xian
National Laboratory for Superconductivity, Institute of
Physics and Center for Condensed Mater Physics, Chinese Academy of Sciences, Beijing 100080
关键词 ：
74.50.+r ,
74.70.Ad ,
74.80.Fp
Abstract ： We report the observation of the Josephson effect on the newly2 with break-junction technique. Similar to the conventional superconductors, the I - V curve can be fitted with the resistively shunted junction model including the noise effect, and a large characteristic voltage Vc = Ic RN = 9.6 meV was obtained. The energy gap determined by the Ambegaokar-Baratoff relation with the fitted Vc is consistent with the Bardeen-Cooper-Schrieffer weak-coupling value well. Our result implies that the superconductor MgB2 is a promising material for the Josephson device applications.
Key words ：
74.50.+r
74.70.Ad
74.80.Fp
出版日期: 2001-09-01
引用本文:
XUAN Yi;LI Zhuang-Zhi;TAO Hong-Jie;REN Zhi-An;CHE Guang-Can;ZHAO Bai-Ru;ZHAO Zhong-Xian. Josephson Effect in MgB2 : Large Ic RN Product and Superconducting Energy Gap
[J]. 中国物理快报, 2001, 18(9): 1254-1255.
2 : Large Ic RN Product and Superconducting Energy Gap
. Chin. Phys. Lett., 2001, 18(9): 1254-1255.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2001/V18/I9/1254
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