Probing Electron-Phonon Interactions Away from the Fermi Level with Resonant Inelastic X-Ray Scattering

Quantifying vibronic coupling with resonant inelastic X-ray scattering

“…Dashwood et al 31 applied a preliminary implementation of the above Green's function method to reproduce the phonon features measured in graphite for a range of detunings across both the s* and p* resonances. This allowed a quantitative determination of the momentum-dependent vibronic coupling strengths across the Brillouin zone.…”

“…Monciu et al 32 recently considered the impact of electron itinerancy while Dashwood et al included the momentum dependence of phonons. 31…”

“…In this section, we review an alternate Green's function formulation of the RIXS cross section that sums phonon contributions to infinite order in the intermediate state and to arbitrary order in the final state. 31,39,51 The objective of this and the next section is to establish a foundation for a many-body perturbation theory description of the RIXS phonon excitation spectrum that is suitable for firstprinciples calculations. We begin in Section III A by describing the electronic excitation process in the absence of phonon interactions.…”

“…Accurately extracting electron-phonon coupling strengths of crystalline systems with dispersive phonons from the relative peak intensities of the phonon peaks of RIXS spectra is non-trivial and remains an open question. 17,[30][31][32] We focus on addressing this challenge in the present work.…”

Multiphonon Process in Mn-Doped ZnO Nanowires

“…As scientific interest in many-body interactions in nanomaterials has grown, the electron–phonon interaction has attracted much attention as relates to understanding the decay process of nonequilibrium electrons in matter and developing related optoelectronic and transport devices. − The multiphonon process as a typical phenomenon induced by strong electron–phonon coupling has been observed in absorption spectra, , photoluminescence (PL) spectra, − and scattering spectra. − For example, the broad-band absorption and emission in the F center are quantitatively explained with the multiphonon transition theory proposed by Huang and Rhys in 1950 . They also predicated Poisson-distributed discrete phonon sidebands of the defect center, which was demonstrated in CdS by Hopfield in 1959 .…”