Published December 2010 | Version v1
Journal article Metadata-only

Phonon softening in La1.74Eu0.1Sr0.16CuO4 studied by inelastic X-ray scattering

Creators

  • 1. Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Kanagawa 226-8503 (Japan)
  • 2. Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561 (Japan)
  • 3. SPring-8, JASRI, and RIKEN, Sayo-gun, Hyogo 679-5198 (Japan)

Description

The phonon dispersions in the CuO2 planes are measured in La1.74Eu0.1Sr0.16CuO4 single crystals using high-resolution inelastic X-ray scattering at BL35XU of SPring-8. The oxygen bond-stretching mode shows anomalous phonon softening (a dip in the dispersion with phonon peak broadening) at Q∼1/3, which coincides with the wave vector of stripe charge modulation. The result indicates that strong electron-electron correlations, in the form of charge-ordering, create a strong electron-phonon coupling in high-temperature superconductors.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.physc.2009.11.072

Additional details

Identifiers

DOI
10.1016/j.physc.2009.11.072;
PII
S0921-4534(09)00789-8;

Publishing Information

Journal Title
Physica. C, Superconductivity
Journal Volume
470
Journal Issue
Suppl.1
Journal Page Range
p. S51-S52
ISSN
0921-4534
CODEN
PHYCE6

Conference

Title
9. international conference on materials and mechanisms of superconductivity
Dates
7-12 Sep 2009
Place
Tokyo (Japan)

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
42068986
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COPPER COMPOUNDS; COPPER OXIDES; DISPERSIONS; ELECTRON CORRELATION; ELECTRON-PHONON COUPLING; ELECTRONS; HIGH-TC SUPERCONDUCTORS; INELASTIC SCATTERING; LANTHANUM COMPOUNDS; MONOCRYSTALS; OXYGEN COMPOUNDS; RESOLUTION; SPRING-8 STORAGE RING; STRONTIUM COMPOUNDS; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; CORRELATIONS; COUPLING; CRYSTALS; DIFFRACTION; ELEMENTARY PARTICLES; FERMIONS; LEPTONS; OXIDES; OXYGEN COMPOUNDS; RADIATION SOURCES; RARE EARTH COMPOUNDS; SCATTERING; STORAGE RINGS; SUPERCONDUCTORS; SYNCHROTRON RADIATION SOURCES; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS

Optional Information

Copyright
Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.