Doppler-shift of the surface bound states in YBCO

M. Aprili, M. Covington, E. Badica, L. H. Greene

Research output: Contribution to journalArticlepeer-review


We have investigated the effect of an applied magnetic field upon the zero-bias-conductance-peak (ZBCP) observed in YBa2Cu3O7/Pb tunnel junctions. We show that the field-induced splitting in the ZBCP depends upon the field orientation with respect to the YBa2Cu3O7 ab-plane and that the low-bias conductance conserves the number of states. Both the conservation of states and the field anisotropy are consistent with the description of the ZBCP as resulting from surface bound states, and the splitting as arising from a Doppler-like energy shift δ = vF pS (where vF is the Fermi velocity and pS the superfluid momentum).

Original languageEnglish (US)
Pages (from-to)1864-1865
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberPART II
StatePublished - 2000


  • Andreev bound states
  • HTCs
  • Superconducting screening
  • Tunneling spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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