Calculation of the electron initiated impact ionization transition rate in cubic and hexagonal phase ZnS

E. Bellotti, K. F. Brennan, R. Wang, P P Ruden

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30 Scopus citations

Abstract

The wave-vector dependent, electron initiated, impact ionization transition rates for the cubic and hexagonal phases of ZnS have been numerically determined using a pseudopotential calculated band-structure and wave-vector dependent dielectric function. The rates for both phases show a strong dependence on the relative band structures. A detailed band-by-band analysis of the transition rate in the first Brillouin zone has been performed to determine the wave-vector dependence of the rate. The energy dependent rates have also been computed by averaging the transition rate over energy. It is found that the hexagonal phase of ZnS exhibits a higher ionization transition rate than the cubic phase. A preliminary estimation of the nature of the threshold has been made using a previously published phonon scattering rate.

Original languageEnglish (US)
Pages (from-to)2961-2964
Number of pages4
JournalJournal of Applied Physics
Volume82
Issue number6
DOIs
StatePublished - Sep 15 1997

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