The spatial extent of surface effects on electron inelastic scattering
作者： L. Calliari , S. Fanchenko
DOI: 10.1002/SIA.5884
关键词: Surface phonon 、 Electron energy loss spectroscopy 、 Surface plasmon 、 Inelastic mean free path 、 Atomic physics 、 Inelastic scattering 、 Electron 、 Plasma oscillation 、 Chemistry 、 Scattering
摘要: We calculate the thickness of surface scattering layer, defined as region where electron inelastic is affected by surface, using semi-classical treatment energy loss provided Chen–Kwei theory. To this end, we consider depth-dependent, surface-related contributions to inverse mean free path, namely, excitation plasmons and reduction in bulk plasmon (Begrenzung effect). find that effects extend further after electrons cross than before they it. The ‘pre-surface thickness’ given ratio velocity plasma frequency, characteristic decay length for effects. All estimates increase linearly with decrease (cosα)x angle α between trajectory normal. Copyright © 2015 John Wiley & Sons, Ltd.
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