title: Atomically resolved real-space imaging of hot electron dynamics.
abstract: The dynamics of hot electrons are central to understanding the properties of many electronic devices. But their ultra-short lifetime, typically 100 fs or less, and correspondingly short transport length-scale in the nanometre range constrain real-space investigations. Here we report variable temperature and voltage measurements of the nonlocal manipulation of adsorbed molecules on the Si(111)-7 × 7 surface in the scanning tunnelling microscope. The range of the nonlocal effect increases with temperature and, at constant temperature, is invariant over a wide range of electron energies. The measurements probe, in real space, the underlying hot electron dynamics on the 10 nm scale and are well described by a two-dimensional diffusive model with a single decay channel, consistent with 2-photon photo-emission (2PPE) measurements of the real time dynamics.
authors.affiliation: Department of Physics, University of Bath, Bath, BA2 7AY, UK.
authors.forename: D
authors.initials: D
authors.lastname: Lock
authors.affiliation: Department of Physics, University of Bath, Bath, BA2 7AY, UK.
authors.forename: K R
authors.initials: KR
authors.lastname: Rusimova
authors.affiliation: Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK.
authors.forename: T L
authors.initials: TL
authors.lastname: Pan
authors.affiliation: Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK.
authors.forename: R E
authors.initials: RE
authors.lastname: Palmer
authors.affiliation: Department of Physics, University of Bath, Bath, BA2 7AY, UK.
authors.forename: P A
authors.initials: PA
authors.lastname: Sloan