Lateral hopping of molecules induced by excitation of internal vibration mode

被引:277
作者
Komeda, T
Kim, Y
Kawai, M
Persson, BNJ
Ueba, H
机构
[1] RIKEN, Wako, Saitama 3510198, Japan
[2] Forschungszentrum Julich, IFF, D-52425 Julich, Germany
[3] Toyama Univ, Dept Elect, Gofuku, Toyama 930, Japan
关键词
D O I
10.1126/science.1069016
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We demonstrate electron-stimulated migration for carbon monoxide (CO) molecules adsorbed on the Pd(110) surface, which is initiated by the excitation of a high-frequency (HF) vibrational mode (C-O stretching mode) with inelastic tunneling electrons from the tip of scanning tunneling microscopy. The hopping phenomenon, however, cannot be detected for CO/Cu(110), even though the hopping barrier is lower than in the CO/Pd(110) case. A theoretical model, which is based on the anharmonic coupling between tow-frequency modes (the hindered-translational mode related to the lateral hopping) and the HF mode combined with electron-hole pair excitation, can explain why the hopping of CO is observed on Pd(110) but not on Cu(110).
引用
收藏
页码:2055 / 2058
页数:4
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