Electron Energy Loss Spectra and Overestimation of Inelastic Mean Free Paths in Many-Pole Models

被引：35

作者：

Bourke, Jay D. ^{[1
]}

Chantler, Christopher T. ^{[1
]}

机构：

[1] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2012年 / 116卷 / 12期

关键词：

D O I：

10.1021/jp210097v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigate established theoretical approaches for the determination of electron energy loss spectra (EELS) and inelastic mean free paths (IMFPs) in solids. In particular, we investigate effects of alternate descriptions of the many plasmon resonances that define the energy loss function (ELF), and the contribution of lifetime broadening in these resonances to the IMFP. We find that despite previously claimed agreement between approaches, approximations of different models consistently conspire to underestimate electron scattering for energies below 100 eV, leading to significant overestimates of the IMFP in this regime.

引用

页码：3202 / 3205

页数：4

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