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Stability of optically-active charged excitons in quasi-two dimensional systems

James R. Chapman·Neil F. Johnson·V. Nikos Nicopoulos
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Abstract

A negatively charged quasi-two dimensional exciton ($X^-$) is solved exactly numerically in the presence of a uniform perpendicular B-field. Various quasi-two dimensional geometries are studied. The charge distribution of the $X^-$ parallel to the B-field is found to be crucial in determining the stability of the optically-active $X^-$ and hence its photoluminescence (PL) signature. The theory provides a quantitative explanation of recent experimental results obtained for a GaAs quantum well. Effects are found which cannot be described within a lowest Landau level approximation. PACS: 78.20.Ls 78.66.-w 73.20.Dx

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James R. Chapman, Neil F. Johnson, V. Nikos Nicopoulos. 1997-03-14. Stability of optically-active charged excitons in quasi-two dimensional systems. https://doi.org/10.1103/physrevb.55.r10221

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