Lattice dynamics and electron-phonon coupling in Sr2RuO4
M. Braden, W. Reichardt, Y. Sidis, Z. Mao, Y. Maeno
TL;DR
This study investigates the lattice vibrations and electron-phonon interactions in Sr2RuO4, revealing normal phonon dispersion and strong coupling for c-polarized phonons, which relate to its unique charge transport properties.
Contribution
It provides new insights into the lattice dynamics and electron-phonon coupling in Sr2RuO4 using neutron scattering and shell-model calculations.
Findings
Normal dispersion of in-plane bond-stretching modes
Strong electron-phonon coupling for c-polarized phonons
Connection to anomalous c-axis charge transport
Abstract
The lattice dynamics in SrRuO has been studied by inelastic neutron scattering combined with shell-model calculations. The in-plane bond-stretching modes in SrRuO exhibit a normal dispersion in contrast to all electronically doped perovskites studied so far. Evidence for strong electron phonon coupling is found for c-polarized phonons suggesting a close connection with the anomalous c-axis charge transport in SrRuO.
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