Long-lived adsorbate states on metal surfaces

It has been shown recently that the peculiarities of the band structure of a metal can qualitatively influence the electron tunnelling between an adsorbate and a metal surface, the so-called resonant charge transfer (RCT). The presence of a projected band gap along the normal to the surface in the c...

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Bibliographic Details
Published in:Faraday discussions 2000, Vol.117 (117), p.15-25
Main Authors: Gauyacq, J P, Borisov, A G, Raşeev, G, Kazansky, A K
Format: Article
Language:English
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Summary:It has been shown recently that the peculiarities of the band structure of a metal can qualitatively influence the electron tunnelling between an adsorbate and a metal surface, the so-called resonant charge transfer (RCT). The presence of a projected band gap along the normal to the surface in the case of Cu(111) has been shown to lead to a blocking of the RCT in the case of Cs/Cu(111), resulting in the existence of a very long-lived excited state. Such long-lived states are potentially very important for surface reaction mechanisms invoking a transient state as an intermediate. Various systems: Cs, model M- negative ion of p pi symmetry, CO adsorbed on Cu(111), are investigated in order to determine the conditions for the blocking of the RCT and the existence of long-lived states.
ISSN:1359-6640
1364-5498
DOI:10.1039/b002630l