Ultrafast charge transfer and atomic orbital polarization
Author
Summary, in English
The role of orbital polarization for ultrafast charge transfer between an atomic adsorbate and a substrate is explored. Core hole clock spectroscopy with linearly polarized x-ray radiation allows to selectively excite adsorbate resonance states with defined spatial orientation relative to the substrate surface. For c(4x2)S/Ru(0001) the charge transfer times between the sulfur 2s(-1)3p(*+1) antibonding resonance and the ruthenium substrate have been studied, with the 2s electron excited into the 3p(perpendicular to)(*) state along the surface normal and the 3p(parallel to)(*) state in the surface plane. The charge transfer times are determined as 0.18 +/- 0.07 and 0.84 +/- 0.23 fs, respectively. This variation is the direct consequence of the different adsorbate-substrate orbital overlap.
Department/s
Publishing year
2007
Language
English
Publication/Series
Journal of Chemical Physics
Volume
127
Issue
17
Document type
Journal article
Publisher
American Institute of Physics (AIP)
Topic
- Natural Sciences
- Physical Sciences
Status
Published
ISBN/ISSN/Other
- ISSN: 0021-9606