Oxygen phonon branches in overdoped La${}_{1.7}$Sr${}_{0.3}$CuO${}_4$

Abstract

The dispersion of the Cu-O bond-stretching vibrations in overdoped La${}_{1.7}$Sr${}_{0.3}$CuO${}_4$ (not superconducting) has been studied by high resolution inelastic neutron scattering. It was found that the doping-induced renormalization of the so-called breathing and the half-breathing modes is larger than in optimally doped La${}_{1.85}$Sr${}_{0.15}$CuO${}_4$. On the other hand, the phonon linewidths are generally smaller in the overdoped sample. Features observed in optimally doped La${}_{1.85}$Sr${}_{0.15}$CuO${}_4$ which suggest a tendency towards charge stripe formation are absent in overdoped La${}_{1.7}$Sr${}_{0.3}$CuO${}_4$.

6 pages, 8 figures

References in corpus (1)

• Electron-phonon interaction in the t-J model

Cited by in corpus (10)

• Interplay between electron-phonon and Coulomb interactions in cuprates
• An Isotopic Fingerprint of Electron-Phonon Coupling in High-Tc Cuprates
• Photoemission kinks and phonons in cuprates
• The impact of dynamical screening on the phonon dynamics of LaCuO
• Effect of the electronic charge gap on LO bond-stretching phonons in undoped La${}_2$CuO${}_4$ calculated using LDA+U
• q-Dependence of the giant bond-stretching phonon anomaly in the stripe compound La1.48Nd0.4Sr0.12CuO4 measured by IXS
• Strong enhancement of d-wave superconducting state in the three-band Hubbard model coupled to an apical oxygen phonon
• A microscopic modeling of phonon dynamics and charge response in NdCuO
• Dynamic charge inhomogenity in cuprate superconductors
• The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates