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|Type:||Artigo de periódico|
|Title:||Evolution of the interband absorption threshold with the density of a two-dimensional electron gas|
|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.|
|Editor:||American Physical Soc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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