Coherence and de-coherence in the Time-Resolved ARPES of realistic materials: an ab-initio perspective
arXiv:2108.10598 · doi:10.1016/j.elspec.2022.147189
Abstract
Coherence and de-coherence are the most fundamental steps that follow the initial photo-excitation occurring in typical Pump&Probe experiments. Indeed, the initial external laser pulse transfers coherence to the system in terms of creation of multiple electron-hole pairs excitation. The excitation concurs both to the creation of a finite carriers density and to the appearance of induced electromagnetic fields. The two effects, to a very first approximation, can be connected to the simple concepts of populations and oscillations. The dynamics of the system following the initial photo-excitation is, thus, entirely dictated by the interplay between coherence and de-coherence. This interplay and the de-coherence process itself, is due to the correlation effects stimulated by the photo-excitation. Single-particle, like the electron-phonon, and two-particles, like the electron-electron, scattering processes induce a complex dynamics of the electrons that, in turn, makes the description of the correlated and photo-excited system in terms of pure excitonic and/or carriers populations challenging.
79 pages, 14 figures, review
References in corpus (22)
- Ultrafast Dynamics of Defect-Assisted Electron-Hole Recombination in Monolayer MoS2
- Many-body perturbation theory calculations using the yambo code
- Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3
- Non-equilibrium quantum condensation in an incoherently pumped dissipative system
- Theoretical description of time-resolved photoemission spectroscopy: application to pump-probe experiments
- Excitons versus electron-hole plasma in monolayer transition metal dichalcogenide semiconductors
- {\it Ab--initio} finite temperature excitons
- Transient excitons at metal surfaces
- Ab initio calculations of ultra-short carrier dynamics in 2D materials: valley depolarization in single-layer WSe
- Ultrafast photodoping and effective Fermi-Dirac distribution of the Dirac particles in Bi2Se3
- First-principles approach to excitons in time-resolved and angle-resolved photoemission spectra
- Time-dependent second Born calculations for model atoms and molecules in strong laser fields
- Real-time GW: Toward an ab initio description of the ultrafast carrier and exciton dynamics in two-dimensional materials
- Ultrafast exciton formation at the ZnO(100) surface
- Comparing the generalized Kadanoff-Baym ansatz with the full Kadanoff-Baym equations for an excitonic insulator out of equilibrium
- Charge separation in donor-C60 complexes with real-time Green's functions: The importance of nonlocal correlations
- Photoinduced dynamics of organic molecules using nonequilibrium Green's functions with second-Born, , -matrix and three-particle ladder correlations
- Electronic transport in molecular junctions: The generalized Kadanoff-Baym ansatz with initial contact and correlations
- Complete collisions approximation to the Kadanoff-Baym equation: a first--principles implementation
- Transport of Correlated Electrons through Disordered Chains: A Perspective on Entanglement, Conductance, and Disorder Averaging
- Observing coherences with time-resolved photoemission
- Detecting photoelectrons from spontaneously formed excitons