Published October 1997 | Version v1
Journal article Metadata-only

Phonon self-energy effects due to superconductivity in Bi2Sr2CaCu2O8+δ

Creators

  • 1. Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, 13083-970 Campinas, Sao Paulo (Brazil)
  • 2. Simon Fraser University, Department of Physics, British Columbia, V5A 1S6 (CANADA)
  • 3. Department of Physics and Scarborough College, University of Toronto, Toronto, Ontario, M5S 1A7 (CANADA)

Description

Raman scattering of A1g phonons in Bi2Sr2CaCu2O8+δ single crystals (δ=0.13, Tc=86K) has been measured as a function of temperature. We report an anomalous softening in the frequency and a decrease in the linewidth of the A1g phonon at 290cm-1 (O1,2 c-axis in-phase vibration) below Tc. We also confirm a smaller anomalous softening in the frequency of the A1g phonon at 465cm-1 (O3 c-axis vibration), but for this phonon mode no linewidth anomaly has been found. We compare the anomalous softening and linewidth behavior in the superconducting state with theoretical calculations for isotropic s-wave, planar d-wave, and dx2-y2 gap symmetries and as for a layered superconductor model. copyright 1997 The American Physical Society

Additional details

Publishing Information

Journal Title
Physical Review. B, Condensed Matter
Journal Volume
56
Journal Issue
13
Journal Page Range
p. 8426-8431
ISSN
0163-1829
CODEN
PRBMDO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
29052494
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; ENERGY GAP; HIGH-TC SUPERCONDUCTORS; LINE WIDTHS; PHONONS; RAMAN EFFECT; RAMAN SPECTRA; STRONTIUM OXIDES; SUPERCONDUCTIVITY
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUASI PARTICLES; SPECTRA; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS