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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.

SUBMITTER: Lock D

PROVIDER: S-EPMC4595757 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature

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Atomically resolved real-space imaging of hot electron dynamics.

Lock D D Rusimova K R KR Pan T L TL Palmer R E RE Sloan P A PA

Nature communications 20150921

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 tem ...[more]

PMID: 26387703

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