Cotunneling model for current-induced events in molecular wires.
basic_science · Level V
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- Record sourced from PubMed, PMID 18808190.
- Also identified by DOI 10.1021/nl801001q.
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Abstract
Many phenomena in molecular transport junctions involve transitions between electronic states of the molecular wire, and, therefore, cannot be described adequately using the Landauer picture. We present a model for cotunneling processes in molecular wires. These are coherent second-order processes that can be observed at low temperatures. As an example, we consider the STM-induced dissociation of acetylene. The large voltage threshold for dissociation observed experimentally is naturally accounted for within the cotunneling model.
Medical subject headings
- Nanowires