Studies of the zero-bias conductance peak (ZBCP) in thin-film superconducting YBa2Cu3O7 planar tunnel junction: Detection and modeling of ZBCP splittings

L. H. Greene, P. J. Hentges, W. K. Park, G. Westwood, M. M. Pafford, W. G. Klemperer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Planar tunneling spectroscopy is performed on superconducting YBa 2Cu3O7 (YBCO) thin films which we grow in four different crystallographic orientations by off-axis sputter deposition. The tunneling insulator is formed via a patented solution-based zirconia deposition process, and measurements on these junctions can show remarkably sharp spectral features. A systematic study of the dependence of the tunneling conductance on applied magnetic fields, temperature and different counter-electrode deposition techniques, and comparison of these results with other published data, reveal some universal behaviors for when spontaneous and magnetic-field induced splittings of the ZBCP occur, or not. Our modeling, in which the values of the tunneling cone, surface faceting and quasiparticle lifetime are varied, accounts for the observed behaviors.

Original languageEnglish (US)
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages467-468
Number of pages2
DOIs
StatePublished - 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: Aug 10 2006Oct 17 2006

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/TerritoryUnited States
CityOrlando, FL
Period8/10/0610/17/06

Keywords

  • Broken time-reversal symmetry
  • Doppler effect in quasiparticles
  • High-temperature superconductivity
  • Unconventional superconductivity; Andreev bound states; Planar tunneling spectroscopy; Zero-bias conductance peak

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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