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Keywords:

  • YBCO films;
  • high temperature superconductors;
  • step-edge Josephson junctions;
  • pulsed laser deposition
Thumbnail image of graphical abstract

A new technology for high temperature superconducting Josephson tunnelling junctions is developed to enhance their properties for applications on-a-chip, avoiding additional fabrication complexity. Junctions with alternating nano-layers of YBa2Cu3O7 and NdBa2Cu3O7 superconductors with a small mismatch between their crystal lattices exhibit stronger tunneling properties due to tuning the artificial grain boundary interfaces of the junctions.