Enhancement of the Binding Energy of Charged Excitons in Disordered Quantum Wires

Details Enhancement of the Binding Energy of Charged Excitons in Disordered Quantum Wires Enhancement of the Binding Energy of Charged Excitons in Disordered Quantum Wires

2004-10-04

arxiv.org/abs/cond-mat/0410050v1

Phys. Rev. B 71, 033301 (2005)

Physics

Condensed Matter

Materials Science

4 Figs

Scientific paper

10.1103/PhysRevB.71.033301

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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