Journal
NANO LETTERS
Volume 11, Issue 3, Pages 927-933Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl1026748
Keywords
Quantum point contact; atomic size contact; electron transport; conductance quantization; molecular junctions; RF STM
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Funding
- BES of DOE [DE-FG03-01ER45943]
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We report on a study of atomic-sized metallic contacts on a time scale of nanoseconds using a combined DC and AC circuit. The approach leads to a time resolution 3-4 orders of magnitude faster than the measurements carried out to date, making it possible to observe fast transient conductance-switching events associated with the breakdown, re-formation, and atomic scale structural rearrangements of the contact. The study bridges the wide gap in the time scales between the molecular dynamic simulations and real world experiments, and the method may be applied to study nano- and subnanosecond processes in other nanoscale devices, such as molecular junctions.
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