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Observation of a superconducting glass state in granular superconducting diamond

Klemencic, G. M. ORCID:, Fellows, J. M., Werrell, J. M., Mandal, S. ORCID:, Giblin, S. R. ORCID:, Smith, R. A. and Williams, O. A. ORCID: 2019. Observation of a superconducting glass state in granular superconducting diamond. Scientific Reports 9 , 4578. 10.1038/s41598-019-40306-1

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The magnetic field dependence of the superconductivity in nanocrystalline boron doped diamond thin films is reported. Evidence of a superconducting glass state is presented, as demonstrated by the observation of a quasi de Almeida-Thouless line in the phase diagram and a logarithmic time dependence of the magnetism. The position of the phase boundary in the H-T plane is determined from electrical transport data by detailed fitting to quasi-zero-dimensional fluctuation conductivity theory. This allows determination of the boundary between resistive and non-resistive behaviour to be made with greater precision than the standard ad hoc onset/midpoint/offset criterion. We attribute the glassy superconductivity to the morphological granularity of the diamond films.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Nature Publishing Group
ISSN: 2045-2322
Date of First Compliant Deposit: 14 February 2019
Date of Acceptance: 11 February 2019
Last Modified: 26 Sep 2023 18:49

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