Title: | ELECTRON INELASTIC MEAN FREE PATHS FOR PLASMON EXCITATIONS AND INTERBAND-TRANSITIONS |
Authors: | KWEI, CM CHEN, YF TUNG, CJ WANG, JP 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
Issue Date: | 20-Aug-1993 |
Abstract: | 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 |
Journal: | SURFACE SCIENCE |
Volume: | 293 |
Issue: | 3 |
Begin Page: | 202 |
End Page: | 210 |
Appears in Collections: | Articles |