Two-band/two-gap superconductivity in carbon-substitutedMgB2evidenced by point-contact spectroscopy
Two-band/two-gap superconductivity in carbon-substitutedMgB2evidenced by point-contact spectroscopy
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点接触光谱证明碳取代 MgB2 中的双能带/双间隙超导性
DOI：
10.1103/physrevb.68.020505
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发表时间：
2003
影响因子：
3.7
通讯作者：
P. Canfield
中科院分区：
文献类型：
--
作者：
P. Samuely;Z. Hoľanová;P. Szabó;J. Kačmarčík;R. Ribeiro;S. Bud’ko;P. Canfield
介绍了用安德列夫反射法测量碳取代的MgB2中的超导能隙。尽管与纯的MgB2相比，17K对相变温度有很强的抑制作用，但系统地观察到了2Δ/kTc1.7的小超导能隙的缩小值。这表明两带/双能隙超导电性在这里仍然保持不变。
The Andreev reflection measurements of the superconducting energy gap in the carbon-substituted MgB 2 are presented. Despite the strong suppression of the transition temperature by 17 K in comparison with the pure MgB 2 , the same reduced value of the small superconducting energy gap with 2Δ/kT c 1.7 has been systematically observed. This indicates that the two-band/two-gap superconductivity is still preserved here.