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Superconducting properties of molybdenum ruthenium alloy Mo0.63Ru0.37

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Abstract

Resistance, magnetization and specific heat measurements were performed on Mo0.63Ru0.37 alloy. All of them confirm that Mo0.63Ru0.37 becomes superconducting at about 7.0 K with bulk nature. Its upper critical field behavior fits to Werthamer-Helfand-Hohenberg (WHH) model quite well, with an upper critical field of μ0Hc2(0) = 8.64 T, less than its Pauli limit. Its electronic specific heat is reproduced by Bardeen-Cooper-Schriffer (BCS)-based α-model with a gap ratio Δ0 = 1.88k B T c , which is a little larger than the standard BCS value of 1.76. We concluded that Mo0.63Ru0.37 is a fully gapped isotropic s-wave superconductor, with its features are mostly consistent with the conventional theory.

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Authors and Affiliations

  1. Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Heifei, 230026, P.R. China

    Wensen Wei, Min Ge & Yuheng Zhang

  2. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of Chinese Academy of Sciences, Hefei, 230031, P.R. China

    Wensen Wei, Shasha Wang, Lei Zhang, Yuyan Han, Haifeng Du, Mingliang Tian & Yuheng Zhang

  3. Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P.R. China

    Wensen Wei, Shasha Wang, Haifeng Du, Mingliang Tian & Yuheng Zhang

Authors
  1. Wensen Wei
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  2. Min Ge
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  4. Lei Zhang
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  8. Yuheng Zhang
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Correspondence to Haifeng Du.

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Wei, W., Ge, M., Wang, S. et al. Superconducting properties of molybdenum ruthenium alloy Mo0.63Ru0.37. Eur. Phys. J. B 91, 56 (2018). https://doi.org/10.1140/epjb/e2018-80714-8

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  • DOI: https://doi.org/10.1140/epjb/e2018-80714-8

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