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Attosecond Dynamics of s p -Band Photoexcitation

2019; American Physical Society; Volume: 123; Issue: 17 Linguagem: Inglês

10.1103/physrevlett.123.176801

1092-0145

Johann Riemensberger, Stefan Neppl, Dionysios Potamianos, Martin Schäffer, Maximilian Schnitzenbaumer, Marcus Ossiander, Christian Schröder, Alexander Guggenmos, Ulf Kleineberg, D. Menzel, Francesco Allegretti, Johannes V. Barth, Reinhard Kienberger, Peter Feulner, A. G. Borisov, Pedro M. Echenique, A. K. Kazansky,

Laser-Matter Interactions and Applications

We report measurements of the temporal dynamics of the valence band photoemission from the magnesium (0001) surface across the resonance of the Γ[over ¯] surface state at 134 eV and link them to observations of high-resolution synchrotron photoemission and numerical calculations of the time-dependent Schrödinger equation using an effective single-electron model potential. We observe a decrease in the time delay between photoemission from delocalized valence states and the localized core orbitals on resonance. Our approach to rigorously link excitation energy-resolved conventional steady-state photoemission with attosecond streaking spectroscopy reveals the connection between energy-space properties of bound electronic states and the temporal dynamics of the fundamental electronic excitations underlying the photoelectric effect.