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Type: Artigo de periódico
Title: Evolution of the interband absorption threshold with the density of a two-dimensional electron gas
Author: Brown, SA
Young, JF
Brum, JA
Hawrylak, P
Wasilewski, Z
Abstract: We have obtained absolute interband absorption spectra from a series of modulation-doped GaAs/Al0.3Ga0.7As multiple quantum wells covering a wide range of two-dimensional electron densities. The evolution of the threshold line shape from an exciton to a Fermi-edge singularity is quantified. We discuss the influence of the doubly occupied bound state (X(-)) on the line shape and compare the results with realistic many-body calculations.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review B. American Physical Soc, v. 54, n. 16, n. 11082, n. 11085, 1996.
Rights: aberto
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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