Carbon 1s studies of diamond(111): Surface shifts, hydrogenation, and electron escape lengths
Carbon 1s studies of diamond(111): Surface shifts, hydrogenation, and electron escape lengths
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金刚石的碳 1s 研究 (111)：表面位移、氢化和电子逃逸长度
DOI：
10.1116/1.572490
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
W. Spicer
中科院分区：
文献类型：
--
作者：
B. Pate;M. Oshima;J. Silberman;G. Rossi;I. Lindau;W. Spicer
光电子能谱研究表明，金刚石（111）的价带发射谱由于氢的吸附和脱附循环而发生可逆的变化。本文报道了金刚石（111）的碳1 s谱随氢包埋退火循环次数和光子能量的变化。我们在无氢重建的2×2/2×1表面的C 1 s光谱中发现了一个额外的肩，以降低结合能，并将此结果解释为由于表面原子的化学位移（0.95±0.1 eV）。我们分析的数据重建模型，并推导出在金刚石中的电子在动能范围25-1000 eV的非弹性散射长度（逃逸长度）。
As probed by photoemission, the valence band emission spectra of diamond(111) undergo reversible changes due to cycles of hydrogen adsorption and desorption. We report here carbon 1s spectra from diamond(111) as a function of hydrogen exposure–annealing cycles and as a function of photon energy. We find an additional shoulder to lower binding energy in the C 1s spectra of the hydrogen‐free reconstructed 2×2/2×1 surface and interpret this result as due to a chemical shift (0.95±0.1 eV) of the surface atoms. We analyze the data in terms of models for reconstruction and also derive the inelastic scattering length (escape length) of electrons in diamond over the kinetic energy range 25–1000 eV.