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RELAXATION OF HOT-ELECTRON DISTRIBUTIONS IN GAAS

TitleRELAXATION OF HOT-ELECTRON DISTRIBUTIONS IN GAAS
Publication TypeJournal Article
Year of Publication1991
AuthorsKim, CS, Shizgal, B
JournalPhysical Review B
Volume44
Pagination2969-2978
Date PublishedAug
Type of ArticleArticle
ISBN Number0163-1829
KeywordsBOLTZMANN COLLISION OPERATOR, ENERGY RELAXATION, MONTE-CARLO METHOD, PHOTO-EXCITATION, PHOTOEXCITED CARRIERS, PROBLEM, QUANTUM WELLS, RUNAWAY, SEMICONDUCTORS, TRANSPORT, VARYING DRAG
Abstract

The field-free equilibration of optically excited nonequilibrium hot electrons is studied theoretically with use of the Boltzmann kinetic equation. The analysis is limited to the situation where the longitudinal-optical-phonon scattering mechanism is dominant. The relaxation of the electron-energy-distribution function and of the average electron energy are investigated numerically for pulsed initial conditions with account taken of the exact collision integral within a single-parabolic-band model. It is shown that the energy dependence of the relevant scattering rate plays an important role in determining the relaxation of the hot-electron distribution.
URL<Go to ISI>://A1991GC06600013