Stability of negative and positive trions in quantum wires

Abstract

Binding energies of negative ($X^{-}$) and positive trions ($X^{+}$) in quantum wires are studied for strong quantum confinement of carriers which results in a numerical exactly solvable model. The relative electron and hole localization has a strong effect on the stability of trions. For equal hole and electron confinement, $X^{+}$ is more stable but a small imbalance of the particle localization towards a stronger hole localization e.g. due to its larger effective mass, leads to the interchange of $X^{-}$ and $X^{+}$ recombination lines in the photoluminescent spectrum as was recently observed experimentally. In case of larger $X^{-}$ stability, a magnetic field oriented parallel to the wire axis leads to a stronger increase of the $X^{+}$ binding energy resulting in a crossing of the $X^{+}$ and $X^{-}$ lines.

References in corpus (6)

• Excitons and charged excitons in semiconductor quantum wells
• Charged exctions in the fractional quantum Hall regime
• Influence of well width fluctuations on the binding energy of excitons, charged excitons and biexcitons in GaAs-based quantum wells
• Shape-independent scaling of excitonic confinement in realistic quantum wires
• Stability of optically-active charged excitons in quasi-two dimensional systems
• Positively charged magneto-excitons in a semiconductor quantum well

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• Ground-state properties of electron-electron biwire systems
• Trions and biexcitons in a nanowire