Doppler shift of the andreev bound states at the YBCO surface

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

Research output: Contribution to journalArticlepeer-review


The effect of applied magnetic field on the zero-bias conductance peak (ZBCP) observed in tunneling spectra of YBCO reveals the number of states is conserved; the splitting magnitude depends upon field orientation and hysteresis. Both the conservation and anisotropy are consistent with the ZBCP resulting from quasiparticle (QP) Andreev bound states at the YBCO surface with a Doppler shift arising from the scalar product between the QP velocity and superfluid momentum, vF·;Ps. The hysteresis is consistent with the effects of strong vortex pinning on the surface screening currents.

Original languageEnglish (US)
Pages (from-to)4630-4633
Number of pages4
JournalPhysical review letters
Issue number22
StatePublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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