Electron-phonon coupling in APd3O4: A = Ca, Sr, and Sr0.85Li0.15
arXiv:2010.08813 · doi:10.1088/1361-648X/abcf60
Abstract
Here we have investigated the role of electron-phonon coupling on the Raman spectrum of narrow bandgap semiconductors APd3O4 (A = Ca, Sr) and hole-doped system Sr0.85Li0.15Pd3O4. Four Raman active phonons are observed at room temperature for all three compounds as predicted by factor group analysis. The lowest energy phonon (~190/202 cm-1) associated with Pd vibrations is observed to exhibit an asymmetric Fano-like lineshape in all the three compounds, indicating the presence of an interaction between the phonon and the electronic continuum. The origin of the electronic continuum states and electron-phonon coupling are discussed based on our laser power- and temperature-dependent Raman results. We have observed an enhanced strength of electron-phonon coupling in Sr0.85Li0.15Pd3O4 at low temperatures which can be attributed to the metallicity in this doped compound.
arXiv comment27 pages, 13 figures, 3 tables
References in corpus (10)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Electron-phonon interactions from first principles
- Variable Electron-Phonon Coupling in Isolated Metallic Carbon Nanotubes Observed by Raman Scattering
- Breit-Wigner-Fano lineshapes in Raman spectra of graphene
- Photo-induced enhancement of excitonic order
- Chiral charge order in 1-TiSe: importance of lattice degrees of freedom
- Fano resonance in Raman scattering of graphene
- Heart and diamond Fermi arcs in Pd and Pt oxide topological Dirac semimetals
- Metal-insulator transition in Ca_{1-x}Li_xPd_3O_4
- Effects of different electron-phonon couplings on spectral and transport properties of small molecule single-crystal organic semiconductors