Ensemble Monte Carlo simulation of optical excitation of AlGaAs

L. Shifren, D. K. Ferry, Kong-Thon Tsen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Ternary semiconductor alloys such as AlxGa1-xAs provide a challenge to our understanding of the physics of alloy effects in semiconductors. It is well known that AlxGa1-xAs is a two-mode alloy, even though the material is supposed to be a smooth random alloy. Recent experimental work has suggested that there is a non-monotonic behavior to the relative scattering strength of the Al mode. We have studied the transport of a range of alloys using the ensemble Monte Carlo (EMC) approach, incorporating the two LO modes, non-equilibrium phonons, and the full electron-electron interaction. We find that anomalies in the ratio of scattering strength, as measured by Raman scattering, are sensitive to the details of the phonon distribution function and the shape of the Raman signal with time. Differences in various reported results arise primarily from differences in measurement technique.

Original languageEnglish (US)
Pages (from-to)419-421
Number of pages3
JournalPhysica B: Condensed Matter
Volume272
Issue number1-4
DOIs
StatePublished - Dec 1 1999

Fingerprint

Photoexcitation
aluminum gallium arsenides
excitation
simulation
Scattering
Semiconductor materials
Electron-electron interactions
Phonons
scattering
Distribution functions
Raman scattering
electron scattering
phonons
Physics
distribution functions
Monte Carlo simulation
Raman spectra
anomalies
physics
electrons

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Ensemble Monte Carlo simulation of optical excitation of AlGaAs. / Shifren, L.; Ferry, D. K.; Tsen, Kong-Thon.

In: Physica B: Condensed Matter, Vol. 272, No. 1-4, 01.12.1999, p. 419-421.

Research output: Contribution to journalArticle

Shifren, L. ; Ferry, D. K. ; Tsen, Kong-Thon. / Ensemble Monte Carlo simulation of optical excitation of AlGaAs. In: Physica B: Condensed Matter. 1999 ; Vol. 272, No. 1-4. pp. 419-421.
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