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Title: Wide and asymmetric oxygen bond-stretching phonons in La{sub 1.85}Sr{sub 0.15}CuO{sub 4}

Abstract

An inelastic-neutron-scattering study performed on a single crystal of superconducting La{sub 1.85}Sr{sub 0.15}CuO{sub 4} reveals that the highest longitudinal phonon mode at wave vector ({pi},0) (planar oxygen bond-stretching mode), of which the frequency is strongly affected by hole doping, has a very wide and asymmetric line shape. This line shape is considered anomalous and cannot be explained by normal electron-phonon coupling (Fermi surface nesting) or a macroscopic inhomogeneous hole distribution. {copyright} {ital 1996 The American Physical Society.}

Authors:
 [1];  [2];  [3];  [4]
  1. Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
  2. Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
  3. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  4. Department of Physics, Tohoku University, Sendai 980 (Japan)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
OSTI Identifier:
390390
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 54; Journal Issue: 14; Other Information: PBD: Oct 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; HIGH-TC SUPERCONDUCTORS; LATTICE VIBRATIONS; LANTHANUM OXIDES; STRONTIUM OXIDES; COPPER OXIDES; QUATERNARY COMPOUNDS; MONOCRYSTALS; NEUTRON DIFFRACTION; INELASTIC SCATTERING

Citation Formats

McQueeney, R J, Egami, T, Shirane, G, and Endoh, Y. Wide and asymmetric oxygen bond-stretching phonons in La{sub 1.85}Sr{sub 0.15}CuO{sub 4}. United States: N. p., 1996. Web. doi:10.1103/PhysRevB.54.R9689.
McQueeney, R J, Egami, T, Shirane, G, & Endoh, Y. Wide and asymmetric oxygen bond-stretching phonons in La{sub 1.85}Sr{sub 0.15}CuO{sub 4}. United States. doi:10.1103/PhysRevB.54.R9689.
McQueeney, R J, Egami, T, Shirane, G, and Endoh, Y. Tue . "Wide and asymmetric oxygen bond-stretching phonons in La{sub 1.85}Sr{sub 0.15}CuO{sub 4}". United States. doi:10.1103/PhysRevB.54.R9689.
@article{osti_390390,
title = {Wide and asymmetric oxygen bond-stretching phonons in La{sub 1.85}Sr{sub 0.15}CuO{sub 4}},
author = {McQueeney, R J and Egami, T and Shirane, G and Endoh, Y},
abstractNote = {An inelastic-neutron-scattering study performed on a single crystal of superconducting La{sub 1.85}Sr{sub 0.15}CuO{sub 4} reveals that the highest longitudinal phonon mode at wave vector ({pi},0) (planar oxygen bond-stretching mode), of which the frequency is strongly affected by hole doping, has a very wide and asymmetric line shape. This line shape is considered anomalous and cannot be explained by normal electron-phonon coupling (Fermi surface nesting) or a macroscopic inhomogeneous hole distribution. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.54.R9689},
journal = {Physical Review, B: Condensed Matter},
number = 14,
volume = 54,
place = {United States},
year = {1996},
month = {10}
}