Increasing the Transition Temperature of High-TC Superconductor Thin Films by Organic Linking of Gold Nanoparticles

H. Alpern, M. Periyasamy, J. Tannous, G. Jung, I. Zaytseva, A. Rosova, Chromik, V. Štrbík, M. Talacko, S. Yochelis, Y. Yacoby, O. Millo, Y. Paltiel

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The transition temperature, TC, of two types of optimally doped cuprate high-TC superconductor films, YBa2Cu3O7-δ and La1.85Sr0.15CuO4, is found to increase upon linking Au nanoparticles to their surface via organic molecules. At the same time, and quite surprisingly, the critical current is reduced. We attribute these results to screening of the Coulomb interactions and smearing the pinning potential landscape. The transition temperature was increased also when the Au NPs were not chemically linked to the surface, consistent with the screening scenario. The linking molecules, however, enable selective adsorption of the gold nanoparticles and their separation from the surface, thus eliminating the conventional proximity effect.

Original languageEnglish
Pages (from-to)1941-1948
Number of pages8
JournalJournal of Superconductivity and Novel Magnetism
Volume33
Issue number7
DOIs
StatePublished - 1 Jul 2020

Keywords

  • 74.62.-c transition temperature variations
  • 74.62.Yb effects of crystal defects, doping, and substitution—other effects
  • 74.72.Gh cuprate superconductors—hole-doped
  • Critical temperature enhancement
  • High-temperature superconductivity
  • Nanoparticles
  • Organic molecules

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