Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-09-02
PRB 78, 155316 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages, 8 figures, submitted
Scientific paper
10.1103/PhysRevB.78.155316
We present a full configuration interaction study of the spontaneous recombination of neutral and singly charged excitons (trions) in semiconductor quantum dots, from weak to strong coupling regimes. We find that the enhancement of the recombination rate of neutral excitons with increasing dot size is suppressed for negative trions, and even reversed for positive trions. Our findings agree with recent comprehensive photoluminescence experiments in self-assembled quantum dots [P. Dalgarno et al. Phys. Rev. B {\bf 77}, 245311 (2008)] and confirm the major role played by correlations in the valence band.The effect of the temperature on the photoluminescence spectrum and that of the ratio between the electron and hole wavefunction lengthscales are also described.
Bertoni Andrea
Climente Juan Ignacio
Goldoni Guido
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