Nonequilibrium RIXS study of an electron-phonon model

Abstract

We use the nonequilibrium dynamical mean field theory formalism to compute the equilibrium and nonequilibrium resonant inelastic X-ray scattering (RIXS) signal of a strongly interacting fermionic lattice model with a coupling of dispersionless phonons to the total charge on a given site. In the atomic limit, this model produces phonon subbands in the spectral function, but not in the RIXS signal. Electron hopping processes however result in phonon-related modifications of the charge excitation peak. We discuss the equilibrium RIXS spectra and the characteristic features of nonequilibrium states induced by photo-doping and by the application of a static electric field. The latter produces features related to Wannier-Stark states, which are dressed with phonon sidebands. Thanks to the effect of field-induced localization, the phonon features can be clearly resolved even in systems with weak electron-phonon coupling.

References in corpus (9)

• Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
• Efficient DMFT-simulation of the Holstein-Hubbard Model
• Dispersive charge density wave excitations and temperature dependent commensuration in Bi2Sr2CaCu2O8+δ
• Dynamical band flipping in fermionic lattice systems: An ac-field-driven change of the interaction from repulsive to attractive
• Quenching Bloch oscillations in a strongly correlated material
• Optical freezing of charge motion in an organic conductor
• Field-induced polaron formation in the Holstein-Hubbard model
• Unraveling the Nature of Charge Excitations in La${}_2$CuO${}_4$ with Momentum-Resolved Cu $K$-edge Resonant Inelastic X-ray Scattering
• Simulation of time-dependent resonant inelastic X-ray scattering using non-equilibrium dynamical mean-field theory

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• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
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• Local interpretation of time-resolved X-ray absorption in Mott insulators: Insights from nonequilibrium dynamical mean-field theory
• Quantifying spatio-temporal patterns in classical and quantum systems out of equilibrium
• Measuring the ultrafast screening of $U$ in photo-excited charge-transfer insulators with time-resolved X-ray absorption spectroscopy
• Nonequilibrium DMFT approach to time-resolved Raman spectroscopy
• Theory of dispersive optical phonons in resonant inelastic x-ray scattering experiments