Inelastic photoemission due to scattering by surface adsorbate vibrations
Inelastic photoemission due to scattering by surface adsorbate vibrations
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DOI：
10.1103/physrevlett.95.207601
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发表时间：
2005-11-11
影响因子：
8.6
通讯作者：
Ushioda, S
中科院分区：
文献类型：
--
作者：
Arafune, R;Hayashi, K;Ushioda, S
通过对CO/Cu（001）表面极低能光电子能谱的高分辨测量，发现了CO振动模对费米能级附近电子的非弹性散射所引起的能量损失分量。（CO）-C-12-O-16的主要能量损失结构出现在费米边以下254 meV处的台阶。当（CO）-C-13-O-18被吸附时，该步骤的同位素位移可达240 meV。这一观察结果证实，这一步骤产生的费米能级附近的光电子的能量损失，通过激发的C-O伸缩模式。
By measuring the very low energy photoemission spectra of the CO/Cu(001) surface with a high resolution, we have found the energy loss components due to inelastic scattering of electrons near the Fermi level by the CO vibrational modes. The main energy loss structure appears as a step at 254 meV below the Fermi edge for (CO)-C-12-O-16. An isotope shift of the step to 240 meV was observed when (CO)-C-13-O-18 was adsorbed. This observation confirms that this step arises from the energy loss of photoelectrons near the Fermi level through the excitation of the C-O stretching mode.