Journal Article

PreJuSER-7382

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lateral hopping of CO molecules on Pt(111) surface by femtosecond laser pulses

Hayashi, M. ; Ootsuka, Y. ; Paulsson, M. ; Persson, B. N. J.FZJ* ; Ueba, H.

2009
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/11014  doi:10.1103/PhysRevB.80.245409

Abstract: Theory of heat transfer between adsorbate vibrational degrees of freedom and ultrafast laser heated hot electrons including vibrational intermode coupling is applied to calculate two-pulse correlation, laser fluence dependence and time dependence of lateral hopping of CO molecules from a step to terrace site on a stepped Pt (111) surface. The intermode coupling is a key ingredient to describe vibrational heating of the frustrated translation mode responsible for the CO hopping. The calculated results are in good agreement with the experimental results, especially if we scale down the experimentally determined absorbed fluence. It is found that CO hopping is induced by indirect heating of the FT mode by the FR mode with a strong frictional coupling to hot electrons.

Keyword(s): J ; heat transfer (auto) ; high-speed optical techniques (auto) ; hopping conduction (auto) ; hot carriers (auto) ; optical pulse shaping (auto) ; platinum (auto) ; vibrational states (auto)

Note: We gratefully acknowledge J. G,dde and U. Hofer for showing us their experimental data before publication and useful discussions. We also thank M. Bonn and Ch. Frischkorm for discussions and a critical reading of the manuscript. This work was supported by the Grant-in-Aid for Scientific Research B (Grant No. 18340085) from the Japan Society for the Promotion of Science.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IFF-1)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2009

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