Phonon dispersion in 1-layer cuprate HgBa2CuO4+d

TL;DR

This study explores the phonon dispersion in single-layer cuprate HgBa2CuO4+d using inelastic x-ray scattering, comparing experimental results with theoretical models and other spectroscopic data to deepen understanding of its lattice dynamics.

Contribution

It provides a detailed experimental analysis of phonon modes in HgBa2CuO4+d and compares these with theoretical and other experimental data, enhancing the understanding of its lattice vibrations.

Findings

Experimental phonon dispersion data obtained via IXS.

Comparison with atomic shell model and other spectroscopic methods.

Discussion of atomic potentials and lattice dynamics.

Abstract

We investigate the low energy acoustical and optical modes in $\mathrm{HgBa_2CuO_{4+\delta}}$ using inelastic x-ray scattering (IXS). The experimental phonon dispersion and the dynamical structure factor are compared with an atomic shell model, and the set of the atomic potentials obtained are discussed. Our results are also compared with those obtained by Raman spectroscopy and with density-of-state data measured by inelastic neutron scattering.