Mott transition from a diluted exciton gas to a dense electron-hole plasma in a single V-shaped quantum wire

We report on the study of many-body interactions in a single high-quality V-shaped quantum wire by means of continuous and time-resolved microphotoluminescence. The transition from a weakly interacting exciton gas when the carrier density n is less than 105 cm-1 (i.e., naX106 cm-1, i.e., naX>1) i...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2003-06, Vol.67
Main Authors: Guillet, T., Grousson, R., Voliotis, Valia, Menant, M., Wang, X.L., Ogura, M.
Format: Article
Language:English
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Summary:We report on the study of many-body interactions in a single high-quality V-shaped quantum wire by means of continuous and time-resolved microphotoluminescence. The transition from a weakly interacting exciton gas when the carrier density n is less than 105 cm-1 (i.e., naX106 cm-1, i.e., naX>1) is systematically followed in the system as the carrier density is increased. We show that this transition occurs gradually: the free carriers first coexist with excitons for naX>0.1; then the electron-hole plasma becomes degenerate at naX=0.8. We also show that the nonlinear effects are strongly related to the kind of disorder and localization properties in the structure especially in the low-density regime
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.67.235324