Signatures of bosonic excitations in high-harmonic spectra of Mott insulators

Abstract

The high harmonic spectrum of the Mott insulating Hubbard model has recently been shown to exhibit plateau structures with cutoff energies determined by $n$th nearest neighbor doublon-holon recombination processes. The spectrum thus allows to extract the on-site repulsion $U$. Here, we consider generalizations of the single-band Hubbard model and discuss the signatures of bosonic excitations in high harmonic spectra. Specifically, we study an electron-plasmon model which captures the essential aspects of the dynamically screened Coulomb interaction in solids and a multi-orbital Hubbard model with Hund coupling which allows to analyze the effect of local spin excitations. For the electron-plasmon model, we show that the high harmonic spectrum can reveal information about the screened and bare onsite interaction, the boson frequency, as well as the relation between boson coupling strength and boson frequency. In the multi-orbital case, string states formed by local spin excitations result in an increase of the radiation intensity and cutoff energy associated with higher order recombination processes.

References in corpus (13)

• High harmonic generation from Bloch electrons in solids
• Impact of the electronic band structure in high-harmonic generation spectra of solids
• Screened Coulomb interaction in the maximally localized Wannier basis
• Ellipticity dependence of high-harmonic generation in solids: unraveling the interplay between intraband and interband dynamics
• Strong-Field Perspective on High-Harmonic Radiation from Bulk Solids
• Diabatic Mechanisms of Higher-Order Harmonic Generation in Solid-State Materials under High-Intensity Electric Fields
• Metal-Insulator phase diagram and orbital selectivity in 3-orbital models with rotationally invariant Hund coupling
• Theoretical description of high-order harmonic generation in solids
• High-order harmonic generation in solid slabs beyond the single active electron
• Interaction quench in the Holstein model: Thermalization crossover from electron- to phonon-dominated relaxation
• Field-induced polaron formation in the Holstein-Hubbard model
• High-harmonic generation in alpha-quartz by the electron-hole recombination
• Dynamical screening in La2CuO4

Cited by in corpus (22)

• High-harmonic generation in one-dimensional Mott insulator
• Anomalous temperature dependence of high-harmonic generation in Mott insulators
• High-order nonlinear optical response of a twisted bilayer graphene
• Electron-correlation induced nonclassicallity of light from high-harmonic generation
• High-harmonic generation in spin-orbit coupled systems
• Correlation effects in high-harmonic generation from finite systems
• Photo-induced nonequilibrium states in Mott insulators
• Excitonic effects on high-harmonic generation in Mott insulators
• Doping and gap-size dependence of high-harmonic generation in graphene : Importance of consistent formulation of light-matter coupling
• Doping effects in high-harmonic generation from correlated systems
• Analytical WKB theory for high-harmonic generation and its application to massive Dirac electrons
• Energy-band echoes: Time-reversed light emission from optically driven quasiparticle wavepackets
• High harmonic generation from electrons moving in topological spin textures
• Local interpretation of time-resolved X-ray absorption in Mott insulators: Insights from nonequilibrium dynamical mean-field theory
• Multidimensional coherent spectroscopy of correlated lattice systems
• Theory for Fourier-limited attosecond pulse generation in solids
• Unconventional gap dependence of high harmonic generation in the extremely strong light-matter coupling regime
• Dominant role of charge ordering on high harmonic generation in Pr_{0.6}Ca_{0.4}MnO_{3}
• Nonclassical dynamics of Néel vector and magnetization accompanied by THz and high-harmonic radiation from ultrafast-light-driven NiO antiferromagnet insulator
• Terahertz harmonic generation across the Mott insulator-metal transition
• Nonequilibrium-DMFT based RIXS investigation of the two-orbital Hubbard model
• Tracking doublon-holon dynamics in high-harmonic generation from Mott insulators