Carrier-carrier scattering in photoexcited quantum wells: inadequacy of the two-particle collision model at low densities
Carrier-carrier scattering of a near-bandgap excited-hole plasma in an intrinsic GaAs quantum well is studied using two different Monte Carlo (MC) techniques. In the first one, the two-particle collisions are modelled using a screened Coulomb interaction. In the second one, the many-particle interac...
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Published in | Semiconductor science and technology Vol. 9; no. 5S; pp. 474 - 477 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
01.05.1994
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Online Access | Get full text |
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Summary: | Carrier-carrier scattering of a near-bandgap excited-hole plasma in an intrinsic GaAs quantum well is studied using two different Monte Carlo (MC) techniques. In the first one, the two-particle collisions are modelled using a screened Coulomb interaction. In the second one, the many-particle interaction is incorporated through classical molecular dynamics (MD). At low excitation densities (2x10 super(10) cm super(-2)) molecular dynamics gives a much slower thermalization of the plasma than the `two-particle collision' technique. This difference is ascribed to the breakdown of the two-particle collision model, because screening of Coulomb interaction at low densities is too weak to limit the range of the two-particle interaction to the mean interparticle distance. The agreement of `two-particle collision' simulations with experiment seems to be fortuitous. The disagreement of MD with experiment implies that the theory is still incomplete. |
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Bibliography: | SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 |
ISSN: | 0268-1242 1361-6641 |
DOI: | 10.1088/0268-1242/9/5S/020 |