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Influence of pairing symmetry and multiple energy gaps on the behaviour of critical current through the Josephson junction

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Abstract

The extended Ambegaokar–Baratoff model was applied to calculate the critical current (\(I_c\)) of a superconductor/insulator/superconductor (S/I/S) Josephson junction with multiple tunnelling channels. We analysed the sensitivity of the critical current, multiplied by normal-state resistance (i.e., \(I_cR_n\) product), to the symmetries of the order parameter in the Bardeen–Cooper–Schrieffer (BCS)-type gap formula. In addition, we showed that the temperature dependence of the product \(I_cR_n(T)\), which corresponds to multigap symmetry, exhibits a shoulder-like feature and has a pronounced kink at \(T\simeq 10\) K for the \(\hbox {SmFeAsO}_{0.9}\)F\(_{0.1}\) superconductor.

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Acknowledgements

The authors are grateful to the Ministry of Innovative Development of Uzbekistan (M.I.D.U.), for financial support in the implementation of this research work.

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Authors and Affiliations

  1. Institute of Nuclear Physics, Uzbekistan Academy of Sciences, 100214, Tashkent, Uzbekistan

    Orifjon Ganiev

  2. Akfa University, Milliy Bog Street, Tashkent, 111221, Uzbekistan

    Orifjon Ganiev

  3. Faculty of Physics, National University of Uzbekistan, 100174, Tashkent, Uzbekistan

    Orifjon Ganiev

  4. Yeoju Technical Institute in Tashkent, 100121, Tashkent, Uzbekistan

    Bakhrom Yavidov

  5. Nukus State Pedagogical Institute named after A’jiniyaz, 230105, Nukus, Uzbekistan

    Bakhrom Yavidov & Azamat Jalekeshov

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  1. Orifjon Ganiev
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Correspondence to Orifjon Ganiev.

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Ganiev, O., Yavidov, B. & Jalekeshov, A. Influence of pairing symmetry and multiple energy gaps on the behaviour of critical current through the Josephson junction. Pramana - J Phys 96, 110 (2022). https://doi.org/10.1007/s12043-022-02358-3

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  • DOI: https://doi.org/10.1007/s12043-022-02358-3

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