Many-body effects in wide parabolic AlGaAs quantum wells

被引：0

作者：

Tabata, A. ^{[1
]}

Martins, M.R. ^{[1
]}

Oliveira, J.B.B. ^{[1
]}

Lamas, T.E. ^{[2
]}

Duarte, C.A. ^{[2
]}

Da Silva, E.C.F. ^{[2
]}

Gusev, G.M. ^{[2
]}

机构：

[1] Universidade Estadual Paulista, Caixa Postal 473, Bauru, 17033-360 Sao Paulo, Brazil

[2] Laboratório de Novos Materiais Semicondutores, Instituto de Física, Universidade de São Paulo, CP 66318, 05315-970 São Paulo, Brazil

来源：

| 1600年 / American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States卷 / 102期

关键词：

Photoluminescence measurements at different temperatures have been performed to investigate the optical response of a two-dimensional electron gas in n -type wide parabolic quantum wells. A series of samples with different well widths in the range of 1000-3000 Å was analyzed. Many-body effects; usually observed in the recombination process of a two-dimensional electron gas; appear as a strong enhancement in the photoluminescence spectra at the Fermi level at low temperature only in the thinnest parabolic quantum wells. The suppression of the many-body effect in the thicker quantum wells was attributed to the decrease of the overlap between the wavefunctions of the photocreated holes and the two-dimensional electrons belonging to the highest occupied electron subband. © 2007 American Institute of Physics;

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Journal article (JA)

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