q dependence of self-energy effects of the plane oxygen vibration in YBa2Cu3O7

D. Reznik, B. Keimer, F. Dogan, Ilhan A. Aksay

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

We have measured the temperature dependence of the peak position and linewidth of the 42.5 meV phonon branch in a twinned single crystal of YBa2Cu3O7 as a function of wave vector q. In the 100/010 direction in the Brillouin zone, considerable softening and broadening occur below the superconducting transition temperature Tc at some values of q. We observe an order of magnitude smaller softening and no linewidth broadening for q in the 110/11̄0 direction. Possible implications of these findings for the symmetry of the superconducting order parameter are discussed.

Original languageEnglish (US)
Pages (from-to)2396-2399
Number of pages4
JournalPhysical review letters
Volume75
Issue number12
DOIs
StatePublished - Jan 1 1995

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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