Photoluminescence signatures of negatively charged magnetoexcitons

Details Photoluminescence signatures of negatively charged magnetoexcitons Photoluminescence signatures of negatively charged magnetoexcitons

1997-07-07

arxiv.org/abs/cond-mat/9707070v2

Physics

Condensed Matter

29 pages LaTeX, 18 ps figures. Minor alterations. To appear in Physical Review B

Scientific paper

10.1103/PhysRevB.57.1762

The negatively charged quasi-two-dimensional exciton ($X^-$) is studied numerically in the presence of a uniform B-field and various in-plane confinements. The corresponding photoluminescence (PL) spectra, including shakeup processes, are calculated. These calculations provide a quantitative explanation of recent experimental PL spectra. The photoluminescence signatures of charged excitons in quantum dots are also examined. Electron-hole pair distriution functions are calculated which show the structure of the charged exciton states (both ground and excited states). Increasing excitation reflects a competition between two effects: partial ionization of either one or two electrons.

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