标题: ELECTRON INELASTIC MEAN FREE PATHS FOR PLASMON EXCITATIONS AND INTERBAND-TRANSITIONS
作者: KWEI, CM
CHEN, YF
TUNG, CJ
WANG, JP
电子工程学系及电子研究所
Department of Electronics Engineering and Institute of Electronics
公开日期: 20-八月-1993
摘要: Both plasmon excitations and interband transitions are important in the response of valence bands to fast electrons. An extended Drude dielectric function was established to describe such a response in solids of complex band structures. Parameters in this function were determined by a fit of the imaginary part of the function to experimental optical data. The real part of the dielectric function and the energy-loss function were also checked with experimental data to confirm critical-point energies in the interband transitions and plasmon energies in the collective excitations. In addition, sum-rules about the imaginary part of the dielectric function and the energy-loss function, respectively, were applied to assure the accuracy of these functions. Electron inelastic mean free paths in several solids were calculated and compared to available experimental and theoretical data.
URI: http://hdl.handle.net/11536/2898
ISSN: 0039-6028
期刊: SURFACE SCIENCE
Volume: 293
Issue: 3
起始页: 202
结束页: 210
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