Reproducible Tunneling Data on Chemically Etched Single Crystals of YBa2Cu3O7

Authors

Michael Gurvitch, Stony Brook UniversityFollow
James M. Valles, Brown UniversityFollow
A. M. Cucolo, University of SalernoFollow
Robert C. Dynes, University of California at San Diego
J. P. Garno, University of Illinois at Urbana-ChampaignFollow
Lynn Schneemeyer, Montclair State UniversityFollow
J. V. Waszczak, University of WashingtonFollow

Document Type

Article

Publication Date

1-1-1989

Abstract

We have fabricated tunnel junctions between chemically etched single crystals of YBa2Cu3O7 and evaporated metal counterelectrodes which exhibit reproducible characteristics. Above the bulk critical temperature of YBa2Cu3O7, Tc, the conductance, G(V), has a linear dependence with voltage and has some asymmetry. Below Tc, additional structure associated with the superconductivity appears in G(V). At TTc there is a reproducible, finite, zero-bias conductance which suggests that there are states at the Fermi energy superconducting YBa2Cu3O7. Junctions with Pb, Sn, Bi, Sb, PbBI, and Au counterelectrodes all show qualitatively similar behavior.

DOI

10.1103/PhysRevLett.63.1008

Montclair State University Digital Commons Citation

Gurvitch, Michael; Valles, James M.; Cucolo, A. M.; Dynes, Robert C.; Garno, J. P.; Schneemeyer, Lynn; and Waszczak, J. V., "Reproducible Tunneling Data on Chemically Etched Single Crystals of YBa2Cu3O7" (1989). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 447.
https://digitalcommons.montclair.edu/chem-biochem-facpubs/447