Inelastic electron scattering from a quasi-one-dimensionalelectron gas
- 作者：Kushwaha ; M.S. ; Zielinski ; P.
- 关键词：A. Nanostructures ; A. Quantum wells ; D. Dielectric responses ; D. Electron&ndash ; electron interactions ; E. Electron energy loss spectroscopy
- 刊名：Solid State Communications
- 出版年：1999
- 期刊代码：101_00381098
- 类别：ms
- 出版时间：October 29, 1999
- 卷：112
- 期：11
- 页码：605-610
- 文件大小：173 K
摘要
A theoretical investigation has been made of the fast-particle energy-loss to a quasi-one-dimensional electron gas (Q1DEG) within the framework of the random-phase-approximation (RPA). For this purpose, we use an exact expression for the inverse dielectric function and the parabolic potential to characterize well the lateral confinement. Three geometries are considered: the fast-particle moving parallel to, being specularly reflected from, and shooting through the Q1DEG. The illustrative numerical examples lead us to infer that the dominant contribution to the loss peaks comes from the intra- and intersubband collective excitations. We argue that high resolution electron energy loss spectroscopy (HREELS) could prove to be a potential alternative of the existing optical techniques.