Publication # 093

G. Livescu, D. A. B. Miller, and D. S. Chemla, "Electron-hole correlation singularity in optical spectra of modulation doped GaAs-AlGaAs quantum wells," Superlattices and Microstructures, 4, 359-361, (1988).

By studying the temperature dependence of absorption and luminescence in modulation doped GaAs-AlGaAs quantum wells, the authors show experimentally that the lowest energy absorption peak has a behavior strikingly different from the corresponding excitonic peak in undoped quantum wells, which is also unexpected in the frame of the single particle picture. They find good qualitative agreement with the many-body model that attributes this 'correlation singularity' to the interaction between the photoexcited hole and the sea of electrons

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