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- W2081234470 abstract "We have studied the coverage-dependent energy transfer dynamics between hot electrons and CO on Cu(110) with femtosecond visible pump, sum frequency probe spectroscopy. We find that transients of the C–O stretch frequency display a red shift, which increases from 3 cm−1 at 0.1 ML to 9 cm−1 at 0.77 ML. Analysis of the transients reveals that the non-adiabatic coupling between the adsorbate vibrational motion and the electrons becomes stronger with increasing coverage. This trend requires the frustrated rotational mode to be the cause of the non-adiabatic behavior, even for relatively weak laser excitation of the adsorbate. We attribute the coverage dependence to both an increase in the adsorbate electronic density of states and an increasingly anharmonic potential energy surface caused by repulsive interactions between neighboring CO adsorbates. This work thus reveals adsorbate-adsorbate interactions as a new way to control adsorbate non-adiabaticity." @default.
- W2081234470 created "2016-06-24" @default.
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- W2081234470 date "2014-12-04" @default.
- W2081234470 modified "2023-09-27" @default.
- W2081234470 title "Coverage dependent non-adiabaticity of CO on a copper surface" @default.
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- W2081234470 doi "https://doi.org/10.1063/1.4902540" @default.
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