What do the two times in two-time correlation functions mean for interpreting tr-ARPES?
arXiv:2109.13444 · doi:10.1016/j.elspec.2021.147104
Abstract
Time-resolved angle-resolved photoemission spectroscopy is one of the most powerful pump-probe measurements of materials driven far from equilibrium. Unlike the linear-response regime, where the frequency-dependent response function is independent of time, in a far-from-equilibrium experiment, the response function depends on two times in the time domain. In this work, we describe how one can use time-dependent frequency response functions and how they involve contributions from times that are near to each other. This implies that they should not be thought of as a frequency-dependent response at a single definite time. Instead, the Fourier uncertainty relations show that they involve contributions from ranges of times and must be interpreted in this light. We use this insight to help understand what time-resolved photoemission measurements actually measure.
arXiv comment(9 pages, 4 figures, published in Journal Electron Spectroscopy and Related Phenomena)
References in corpus (25)
- Nonequilibrium dynamical mean-field theory and its applications
- Snapshots of non-equilibrium Dirac carrier distributions in graphene
- Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3
- Nonequilibrium dynamical mean-field theory
- Directly visualizing the momentum forbidden dark excitons and their dynamics in atomically thin semiconductors
- Theoretical description of time-resolved photoemission spectroscopy: application to pump-probe experiments
- Tracking Cooper Pairs in a Cuprate Superconductor by Ultrafast Angle-Resolved Photoemission
- Ground State and Finite Temperature Lanczos Methods
- Momentum-Resolved Ultrafast Electron Dynamics in Superconducting Bi2Sr2CaCu2O8+delta
- Direct determination of mode-projected electron-phonon coupling in the time-domain
- Ultrafast Electron Dynamics in the Topological Insulator Bi2Se3 Studied by Time-Resolved Photoemission Spectroscopy
- Energy dissipation in the time domain governed by bosons in a correlated material
- Photoemission signature of excitons
- Theory of exciton dynamics in time-resolved ARPES: intra- and intervalley scattering in two-dimensional semiconductors
- Inequivalence of Single-Particle and Population Lifetimes in a Cuprate Superconductor
- Effect of dynamical spectral weight redistribution on effective interactions in time-resolved spectroscopy
- Comparing the generalized Kadanoff-Baym ansatz with the full Kadanoff-Baym equations for an excitonic insulator out of equilibrium
- Mapping of the unoccupied states and relevant bosonic modes via the time dependent momentum distribution
- An ab-initio approach to describe coherent and non-coherent exciton dynamics
- Establishing non-thermal regimes in pump-probe electron-relaxation dynamics
- Dynamics of incoherent exciton formation in CuO: Time- and angle-resolved photoemission spectroscopy
- From carriers and virtual excitons to exciton populations: Insights into time-resolved ARPES spectra from an exactly solvable model
- Relationship between Population Dynamics and the Self-Energy in Driven Non-Equilibrium Systems
- How to pin down the pairing interaction for high Tc superconductivity in cuprates
- Observing coherences with time-resolved photoemission
Cited by in corpus (5)
- Time- and Angle-Resolved Photoemission Studies of Quantum Materials
- Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
- Topological zero modes and edge symmetries of metastable Markovian bosonic systems
- Ubiquitous Coexisting Electron-Mode Couplings in High Temperature Cuprate Superconductors
- Energy flow during relaxation in an electron-phonon system with multiple modes: A nonequilibrium Green's function study