q Dependence of Self-Energy Effects of the Plane Oxygen Vibration in YBa₂Cu₃O₇

Author

Dmitry V. Reznik
Bernhard Keimer
Fatih Dogan, Missouri University of Science and TechnologyFollow
Ilhan A. Aksay

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 110/110 direction. Possible implications of these findings for the symmetry of the superconducting order parameter are discussed.

Recommended Citation

D. V. Reznik et al., "q Dependence of Self-Energy Effects of the Plane Oxygen Vibration in YBa₂Cu₃O₇," Physical Review Letters, vol. 75, no. 12, pp. 2396 - 2399, American Physical Society (APS), Sep 1995.

The definitive version is available at https://doi.org/10.1103/PhysRevLett.75.2396

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1995 American Physical Society (APS), All rights reserved.

Publication Date

01 Sep 1995