Gap anisotropy and phonon self-energy effects in single-crystal YBa2Cu3O7-

S. L. Cooper, F. Slakey, M. V. Klein, J. P. Rice, E. D. Bukowski, D. M. Ginsberg

Research output: Contribution to journalArticlepeer-review

Abstract

We report a Raman scattering investigation of superconducting gap anisotropy in single-crystal YBa2Cu3O7. Gap anisotropy is investigated by studying the peak in the low-temperature Raman continuum in various symmetries. Roughly a 35% difference in the energy of this peak is observed between different symmetries, suggesting the presence of substantial gap anisotropy. Anisotropy is further evidenced by the damping behavior of the 340-cm-1 Raman-active phonon below Tc, which displays increased attenuation due to phonon-induced pair breaking. The temperature dependence of this attenuation is consistent with a T=0 pair-breaking peak which is much larger than the 340-cm-1 phonon in certain regions of the Fermi surface.

Original languageEnglish (US)
Pages (from-to)11934-11937
Number of pages4
JournalPhysical Review B
Volume38
Issue number16
DOIs
StatePublished - Jan 1 1988

ASJC Scopus subject areas

  • Condensed Matter Physics

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