Lateral Hopping of CO on Ag(110) by Multiple Overtone Excitation

Physical Review Letters
Junepyo OhYousoo Kim

Abstract

A novel type of action spectrum representing multiple overtone excitations of the v(M-C) mode was observed for lateral hopping of a CO molecule on Ag(110) induced by inelastically tunneled electrons from the tip of a scanning tunneling microscope. The yield of CO hopping shows sharp increases at 261±4  mV, corresponding to the C-O internal stretching mode, and at 61±2, 90±2, and 148±7  mV, even in the absence of corresponding fundamental vibrational modes. The mechanism of lateral CO hopping on Ag(110) was explained by the multistep excitation of overtone modes of v(M-C) based on the numerical fitting of the action spectra, the nonlinear dependence of the hopping rate on the tunneling current, and the hopping barrier obtained from thermal diffusion experiments.

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Citations

Nov 4, 2016·The Journal of Physical Chemistry Letters·Hyun Jin YangYousoo Kim
Jan 11, 2020·Physical Review Letters·Caiyun ChenKehui Wu
Feb 6, 2017·Physical Review Letters·Zhumin HanW Ho
Dec 21, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·José A Garrido TorresRenald Schaub
Oct 5, 2021·The Journal of Physical Chemistry Letters·Minhui LeeYousoo Kim

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