q-Dependence of the giant bond-stretching phonon anomaly in the stripe compound La1.48Nd0.4Sr0.12CuO4 measured by IXS

Abstract

Inelastic x-ray scattering (IXS) was used to study the Cu-O bond-stretching vibrations in the static stripe phase compound La1.48Nd0.4Sr0.12CuO4. It was found that the intrinsic width in Q-space of the previously reported huge anomalous phonon softening and broadening is approximately 0.08r.l.u HWHM. A detailed comparison was also made to inelastic neutron scattering (INS) studies, which indicate a two-peak lineshape (with superimposed broad and narrow peaks) in the vicinity of the anomaly. The high resolution IXS data show that the narrow peak is mostly an artifact of the poor transverse Q-resolution of INS. Otherwise the agreement between the INS and IXS was excellent.

arXiv comment8 pages 3 figures SNS2007 conference proceedings; version 2: minor changes throughout the text

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Cited by in corpus (14)

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• Isotope effect and bond-stretching phonon anomaly in high-Tc cuprates
• Phonon anomalies and dynamic stripes
• Evidence for a charge collective mode associated with superconductivity in copper oxides from neutron and x-ray scattering measurements of La${}_{2-x}$Sr${}_x$CuO${}_4$
• Giant electron-phonon anomaly in doped La2CuO4 and other cuprates
• Charge Order Lock-in by Electron-Phonon Coupling in La${}_{1.675}$Eu${}_{0.2}$Sr${}_{0.125}$CuO${}_4$
• Superconducting dome in ferroelectric-type materials from soft mode instability
• Introduction to High-Resolution Inelastic X-Ray Scattering
• Phonon renormalization from local and transitive electron-lattice couplings in strongly correlated systems
• Anomalous softening of phonon-dispersion in cuprate superconductors
• Momentum-resolved lattice dynamics of parent and electron-doped Sr${}_2$IrO${}_4$
• Anomalous Dispersion of LO Phonons in Oxygen-Doped La${}_{2-x}$Sr${}_x$CuO${}_{4+\delta }$
• Giant electron-phonon coupling of the breathing plane oxygen phonons in the dynamic stripe phase of La${}_{1.67}$Sr${}_{0.33}$NiO${}_4$