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Tunnel Junctions on Chemically Etched YBa2Cu3O7 Thin Films

  • Julia M. Phillips (a1), J. M. Valles (a1), A. M. Cucolo (a2), R. C. Dynes (a1), M. Gurvitch (a1), J. P. Garno (a1) and J. H. Marshall (a1)...

Abstract

We have prepared low leakage tunnel junctions on epitaxial YBa2Cu3O7 (YBCO) films grown on SrTiO3(001) by evaporating Pb counterelectrodes onto chemically etched YBCO surfaces. Structure in the voltage dependence of the tunneling conductance is reproducible and strongly resembles what has been obtained in similarly etched junctions on YBCO single crystals.

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