How Circular Dichroism in time- and angle-resolved photoemission can be used to spectroscopically detect transient topological states in graphene

Abstract

Pumping graphene with circularly polarized light is the archetype of light-tailoring topological bands. Realizing the induced Floquet-Chern insulator state and tracing clear experimental manifestions has been a challenge, and it has become clear that scattering effects play a crucial role. We tackle this gap between theory and experiment by employing microscopic quantum kinetic calculations including realistic electron-electron and electron-phonon scattering. Our theory provides a direct link to the build-up of the Floquet-Chern insulator state in light-driven graphene and its detection in time- and angle-resolved photoemission spectroscopy (ARPES). This allows us to study the stability of the Floquet features due to dephasing and thermalization effects. We also discuss the ultrafast Hall response in the laser-heated state. Furthermore, the induced pseudospin texture and the associated Berry curvature gives rise to momentum-dependent orbital magnetization, which is reflected in circular dichroism in ARPES (CD-ARPES). Combining our nonequilibrium calculations with an accurate one-step theory of photoemission allows us to establish a direct link between the build-up of the topological state and the dichroic pump-probe photoemission signal. The characteristic features in CD-ARPES are further corroborated to be stable against heating and dephasing effects. Thus, tracing circular dichroism in time-resolve photoemission provides new insights into transient topological properties.

arXiv comment16 pages, 8 figures

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Cited by in corpus (45)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in Photoelectron Angular Distributions
• Observation of Floquet states in graphene
• Measurement of Topological Order based on Metric-Curvature Correspondence
• Are there universal signatures of topological phases in high harmonic generation? Probably not
• Direct observation of Floquet-Bloch states in monolayer graphene
• Gauge invariance of light-matter interactions in first-principle tight-binding models
• Observing light-induced Floquet band gaps in the longitudinal conductivity of graphene
• A many-body approach to transport in quantum systems: From the transient regime to the stationary state
• Polarization-Modulated Angle-Resolved Photoemission Spectroscopy: Towards Circular Dichroism without Circular Photons and Bloch Wavefunction Reconstruction
• Light-induced phase crossovers in a quantum spin Hall system
• A Photoinduced Floquet Mixed-Weyl Semimetallic Phase in a Carbon Allotrope
• A quantum Boltzmann equation for strongly correlated electrons
• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
• Electronic transport in molecular junctions: The generalized Kadanoff-Baym ansatz with initial contact and correlations
• Detecting light-induced Floquet band gaps of graphene via trARPES
• Nonequilibrium diagrammatic many-body simulations with quantics tensor trains
• Quantum optics measurement scheme for quantum geometry and topological invariants
• Manipulating the symmetry of photon-dressed electronic states
• Coherent Modulation of Quasiparticle Scattering Rates in a Photoexcited Charge-Density-Wave System
• Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems
• Spin- and time-resolved photoelectron spectroscopy and diffraction studies using time-of-flight momentum microscopes
• Quantum Hall edge states under periodic driving: a Floquet induced chirality switch
• Dynamically Induced Exceptional Phases in Quenched Interacting Semimetals
• Suppression of Heating by Multi-color Driving Protocols in Floquet Engineered Strongly Correlated Systems
• Light-induced anomalous Hall conductivity in massive 3D Dirac semimetal Co${}_3$Sn${}_2$S${}_2$
• Real-time dynamics of the photoinduced topological state in organic conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$ under continuous-wave and pulse excitations
• Relating the Hall conductivity to the many-body Chern number using Fermi's Golden rule and Kramers-Kronig relations
• Floquet Graphene Antidot Lattices
• Dynamical phase transitions in the photodriven charge-ordered Dirac-electron system
• In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator
• Optimizing Floquet engineering for non-equilibrium steady states with gradient-based methods
• Topological phase transitions via attosecond x-ray absorption spectroscopy
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• Optical conductivity and orbital magnetization of Floquet vortex states
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• Deterministic Equations for Feedback Control of Open Quantum Systems III: Full counting statistics for jump-based feedback
• Theory of subcycle time-resolved photoemission: application to terahertz photodressing in graphene
• Mechanism for Synchronization of Charge Oscillations in Dimer Lattices
• Development of a 10.8-eV Tabletop Femtosecond Laser with Tunable Polarization for High-Resolution Angle-Resolved Photoemission Spectroscopy
• Photoinduced Pseudospin Polarization in a Three-Orbital Hubbard Model
• A causality-based divide-and-conquer algorithm for nonequilibrium Green's function calculations with quantics tensor trains
• Circular dichroism in the photoelectron angular distribution of achiral molecules