| Issue |
Europhys. Lett.
Volume 42, Number 4, May II 1998
|
|
|---|---|---|
| Page(s) | 449 - 454 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00270-x | |
| Published online | 01 September 2002 | |
Experimental determination of the vibrations and diffusion of isolated CO molecules moving parallel to a Pt(111) surface
Max-Planck-Institut für Strömungsforschung - Göttingen, Germany
Received:
9
February
1998
Accepted:
6
April
1998
The full-width half-maxima (FWHM)
of the 6 meV parallel frustrated translation mode of CO chemisorbed
on Pt(111) (
1.5 eV) have been measured using high-resolution
helium atom scattering over
the temperature range 50–200 K for four different isotopomers
and the results are compared with earlier measurements on CO/Cu(001),
which has a much lower adsorption energy of 0.7 eV. The FWHM is
independent of the temperature and isotopomer and corresponds to a vibrational
lifetime of 1.37±0.22 ps. The observed lifetime is attributed
to both phononic and electronic frictional damping and is
used, in conjunction with quasi-elastic helium scattering
measurements, to estimate the diffusion barrier to be
meV.
PACS: 68.35.Ja – Surface and interface dynamics and vibrations / 68.35.Fx – Diffusion; interface formation
© EDP Sciences, 1998
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.