Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-11-26
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 3 figures
Scientific paper
Auger recombination (AR) of the ground biexciton state in quantum-confined lead salt nanowires (NWs) with a strong coupling between the conduction and the valence bands is shown to be strongly suppressed, and only excited biexciton states contribute to Auger decay. The AR rate is predicted to be greatly reduced when temperature or the NW radius are decreased, and the effect is explained by decrease in both the population of excited biexciton states and overlap of phonon-broadened single- and biexciton states. Suppression of AR of multiexciton states exhibiting strong radiative decay makes obviously lead salt NWs a subject of special interest for numerous lasing applications.
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