Direct Observation of Vibrational Energy Delocalization on Surfaces: CO on Ru(001)
- 13 November 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (20) , 4341-4344
- https://doi.org/10.1103/physrevlett.85.4341
Abstract
We report the experimental observation of the gradual transition from a local oscillator to a two-dimensional delocalized phonon, observed for the CO-stretch vibration of carbon monoxide adsorbed on a Ru(001) surface by means of broadband-infrared saturation sum-frequency spectroscopy. The data are theoretically reproduced by an exchange model with residence times of the excitation down to 2.5 ps.Keywords
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