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

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Title
Lateral Hopping of CO on Ag(110) by Multiple Overtone Excitation
Author(s)
Junepyo Oh; Hyunseob Lim; Ryuichi Arafune; Jaehoon Jung; Maki Kawai; Yousoo Kim
Publication Date
2016-02
Journal
PHYSICAL REVIEW LETTERS, v.116, no.5, pp.056101 -
Publisher
AMER PHYSICAL SOC
Abstract
A novel type of action spectrum representing multiple overtone excitations of the upsilon(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 upsilon(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. © 2016 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2498
DOI
10.1103/PhysRevLett.116.056101
ISSN
0031-9007
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
Files in This Item:
3. PhysRevLett.116.pdfDownload

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