Moldavian Journal of the Physical Sciences (Feb 2008)

Electron collision rate and multiquantum transitions in solids

  • Cliucanov, Alexandr,
  • Catanoi, A.,
  • Petruşcă, Alexandru,
  • Awawdeh, Adnan

Journal volume & issue
Vol. 7, no. 1
pp. 16 – 21

Abstract

Read online

Multiquantum integral kinetic equation for the longitudinal complex dielectric function is derived. Heisenberg equation of motion and fluctuation-dissipation theorem has been used to calculate multiplasmon transmission electron energy loss spectra. Strong interaction between high-energy electrons penetrating the solid state and plasma of valence electrons is taken into account. It is shown that average number of high-frequency plasmons generated in every collision process is more than one for typical values of metal parameters. It is obtained that excitation of a good few of plasmons is simultaneous event. Calculated multiplasmon structure of electron energy loss spectra coincides with experimental one.