Josephson Effect in MgB2: Large IcRlN Product and Superconducting Energy Gap

宣毅; 李壮志; 陶宏杰; 任治安; 车广灿; 赵柏儒; 赵忠贤

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Josephson Effect in MgB2: Large IcRlN Product and Superconducting Energy Gap

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We report on the observation of the Josephson effect on the newly discovered superconductor MgB2 with the breakjunction technique. Similar to 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 = IcRN = 9.6meV was obtained. The energy gap determined by the Ambegaokar-Baratoff relation with the fitted Vc is very consistent with the Bardeen-Cooper-Schrieffer weak-coupling value. Our result implies that the superconductor MgB2 is a promising material for Josephson device applications.

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《中国物理快报：英文版》 |2001年第9期|1254-1255|共2页
作者
宣毅; 李壮志; 陶宏杰; 任治安; 车广灿; 赵柏儒; 赵忠贤;
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National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100080;

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正文语种 chi
中图分类物理学;
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Josephson Effect in MgB2: Large IcRlN Product and Superconducting Energy Gap

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