Abstract
The original research results for thin disordered HTSC films based on YBCO are presented in this article. Several experiments have been carried out to confirm a theoretical prediction that the s-phase of superconducting pairing in disordered d-type superconductors can occur with a gradual decrease in the mean free path. The YBa2Cu3O7 – x films are used as samples which possess a d-type of superconducting state that was experimentally confirmed. A gradual decrease in the mean free path was achieved by both thermal annealing and ion irradiation. The experiments included measurements of temperature dependence of the London penetration depth λ and resistive studies.
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ACKNOWLEDGEMENTS
The work was done using equipment of Center “Physics and technology of micro- and nanostructures” at IPM RAS.
The authors are grateful to A.S. Mel’nikov for numerous discussions of the results of the work and valuable suggestions. The authors are also grateful to V.V. Kurin, V.I. Gav-rilenko, and S.V. Sharov for useful comments.
Funding
This work was supported by grant no. 18-42-520051 from the Russian Foundation for Basic Research. This work was also supported by the Program of the Presidium of the Russian Academy of Sciences I.1 “Fundamental Problems of High-Temperature Superconductivity” and was performed as part of a state task for the Institute for Physics of Microstructures for 2020.
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Translated by E. Boltukhina
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Antonov, A.V., El’kina, A.I., Vasiliev, V.K. et al. Experimental Observation of s-Component of Superconducting Pairing in Thin Disordered HTSC Films Based on YBCO. Phys. Solid State 62, 1598–1603 (2020). https://doi.org/10.1134/S1063783420090036
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DOI: https://doi.org/10.1134/S1063783420090036