• Open Access

Disordered hyperuniformity in superconducting vortex lattices

José Benito Llorens, Isabel Guillamón, Ismael G. Serrano, Rosa Córdoba, Javier Sesé, José María De Teresa, M. Ricardo Ibarra, Sebastián Vieira, Miguel Ortuño, and Hermann Suderow
Phys. Rev. Research 2, 033133 – Published 24 July 2020

Abstract

The current carrying capability of type II superconductors under magnetic fields is determined to a large extent by the interaction of superconducting vortices with pinning centers. Vortices are arranged in lattices with varying degrees of disorder depending on the balance between the intervortex interactions and the pinning strength. We analyze here vortex arrangements in disordered vortex lattices of different superconducting systems, single crystals (Co-doped NbSe2, LiFeAs, and CaKFe4As4), and amorphous W-based thin films (with critical temperatures Tc from 4 K to 35 K and critical fields from 3.4 T to more than 90 T). We calculate for each case the structure factor and number variance and compare to calculations on an interacting set of partially pinned particles. We find that random density fluctuations appear when pinning overcomes interactions and show that the suppression of density fluctuations is correlated to the presence of interactions. We discuss the results within the framework of hyperuniform distributions and find that all studied lattices follow a similar increase of the number variance with the defect density.

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  • Received 24 February 2020
  • Revised 11 May 2020
  • Accepted 22 June 2020

DOI:https://doi.org/10.1103/PhysRevResearch.2.033133

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

José Benito Llorens1, Isabel Guillamón1, Ismael G. Serrano2,3, Rosa Córdoba2,3,4, Javier Sesé2,3, José María De Teresa2,3, M. Ricardo Ibarra2,3, Sebastián Vieira1, Miguel Ortuño5, and Hermann Suderow1

  • 1Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos, Unidad Asociada UAM, CSIC, Departamento de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center, Universidad Autónoma de Madrid, 28049 Madrid, Spain
  • 2Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
  • 3Departamento de Física de la Materia Condensada and Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
  • 4Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Spain
  • 5Departamento de Física, CIOyN, Universidad de Murcia, Murcia 30071, Spain

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Vol. 2, Iss. 3 — July - September 2020

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