Two band/two gap superconductivity in carbon-substituted MgB2 evidenced by point-contact spectroscopy

J. Kacmarcik; P. C. Canfield; P. Samuely; P. Szabo; R. A. Ribeiro; S. L. Bud'ko; Z. Holanova

arxiv: cond-mat/0303644 · v1 · submitted 2003-03-31 · ❄️ cond-mat.supr-con · cond-mat.mtrl-sci

Two band/two gap superconductivity in carbon-substituted MgB2 evidenced by point-contact spectroscopy

P. Samuely , Z. Holanova , P. Szabo , J. Kacmarcik , R. A. Ribeiro , S. L. Bud'ko , P. C. Canfield This is my paper

classification ❄️ cond-mat.supr-con cond-mat.mtrl-sci

keywords bandcarbon-substitutedenergysuperconductingsuperconductivityandreevapproxbeen

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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 $2\Delta/kT_c \approx$ 1.7 has been systematically observed. This indicates that the two band/two gap superconductivity is still preserved here.

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Two band/two gap superconductivity in carbon-substituted MgB2 evidenced by point-contact spectroscopy

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