Enhancement of the binding energy of charged excitons in disordered quantum wires

2004/10/04 by T. Otterburg, D. Y. Oberli, M.‐A. Dupertuis +7
Materials Science · Physics and Astronomy · #Quantum Dots Synthesis And Properties #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.71.033301

published as Phys. Rev. B 71, 033301 (2005) · 4 Figs

arxiv created 2004/10/04 · openalex publication_date 2005/01/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Negatively and positively charged excitons are identified in the spatially resolved photoluminescence spectra of quantum wires. We demonstrate that charged excitons are weakly localized in disordered quantum wires. As a consequence, the enhancement of the ``binding energy'' of a charged exciton is caused, for a significant part, by the recoil energy transferred to the remaining charged carrier during its radiative recombination. We discover that the Coulomb correlation energy is not the sole origin of the ``binding energy,'' in contrast to charged excitons confined in quantum dots.

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