Attosecond Dynamics of sp-Band Photoexcitation
Johann Riemensberger1,2, Stefan Neppl1, Dionysios Potamianos1,2
1Physik Department, Technische Universität München, James-Franck-Str 1, 85748 Garching, Germany.
Abstract:
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.
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