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Data · dataset · 2016

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

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The tip of a scanning tunnelling microscope is an atomic-scale source of electrons and holes.

Description

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.

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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.

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Stated by source
Physical sciences
Inferred from text
Image 65% · Imaging 75%
Provenance · 1 source records, 7 field assertions
SourceKeyLast seenRaw
DataCite10.15125/bath-0023015 d agoJSON v1
FieldAssertionExtractorEvidence
concepts[field].fos:physical-sciencessource · DataCiteconnector:datacite@1.0.0
concepts[modality].local:modality:imageenrichment · DataCitekeyword-concept-rules@1.0.0title+description (65%)
concepts[modality].local:modality:imagingenrichment · DataCitekeyword-concept-rules@1.0.0title+description (75%)
descriptionsource · DataCiteconnector:datacite@1.0.0/data/attributes/descriptions
publication_datesource · DataCiteconnector:datacite@1.0.0/data/attributes/dates
titlesource · DataCiteconnector:datacite@1.0.0/data/attributes/titles/0/title
version_labelsource · DataCiteconnector:datacite@1.0.0