Data for paper: Initiating and imaging the coherent surface dynamics of charge carriers in real space


Sloan, P., Rusimova, K., Bannister, N., Harrison, P., Crampin, S., Palmer, R., Lock, D., 2016. Data for paper: Initiating and imaging the coherent surface dynamics of charge carriers in real space. University of Bath. https://doi.org/10.15125/BATH-00230.


Dataset abstract

The tip of a scanning tunnelling microscope is an atomic-scale source of electrons and holes. As the injected charge spreads out it can induce adsorbed molecules to react. By comparing large-scale `before' and `after' images of an adsorbate covered surface, the spatial extent of the nonlocal manipulation is revealed. Here we measure the nonlocal manipulation of toluene molecules on the Si(111)-7x7 surface at room temperature. Both the range and probability of nonlocal manipulation have a voltage dependence. A region within 5 to 15 nm of the injection site shows a marked reduction in manipulation. We propose that this region marks the extent of the initial coherent (i.e., ballistic) time-dependent evolution of the injected charge carrier. Using scanning tunnelling spectroscopy, we develop a model of this time-dependent expansion of the initially localized hole wavepacket within a particular surface state and deduce a quantum coherence (ballistic) lifetime of about 10 fs.

Title: Data for paper: Initiating and imaging the coherent surface dynamics of charge carriers in real space
Subjects: Chemical reaction dynamics and mechanisms > Physical Organic Chemistry
Superconductivity, magnetism and quantum fluids > Condensed Matter Physics
Departments: Faculty of Science > Physics
DOI: https://doi.org/10.15125/BATH-00230
URI: https://researchdata.bath.ac.uk/id/eprint/230
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