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