Journal Article

PreJuSER-2772

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Heating of adsorbate by vibrational-mode coupling

Ueba, H. ; Persson, B. N. J.FZJ*

2008
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/11067  doi:10.1103/PhysRevB.77.035413

Abstract: We present a theory for the energy transfer between adsorbates and ultrafast laser heated hot electrons in the presence of the vibrational-mode coupling. This mode coupling provides another source of vibrational heating, in addition to the direct heating by hot electrons via friction coupling. The theory is general and accurate and easy to implement to analyze adsorbate motions induced by femtosecond laser heating of the adsorbate and/or metal systems. The heat transfer equation for the coupled harmonic oscillators is applied to the recent time-resolved studies of hopping of carbon monoxide and atomic oxygen on Pt surfaces. It is found that the temperature of the frustrated translation mode responsible for hopping can become high enough, even when its direct friction coupling to the hot electrons is too weak to induce motion.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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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 2008

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Database coverage:
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