Dynamics of Coulomb-correlated electron-hole pairs in disordered semiconductor nanowires

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The dynamics of optically generated electron-hole pairs is investigated in a disordered semiconductor nanowire. The particle pairs are generated by short laser pulses and their dynamics is followed using the Heisenberg equation of motion. Is is shown that Coulomb-correlation acts against localization in the case of the two-interacting particles (TIP) problem. Furthermore, currents are generated using a coherent combination of full-gap and half-gap pulses. The subsequent application of a full-gap pulse after time $τ$ produces an intraband echo phenomenon $2τ$ time later. The echo current is shown to depend on the mass ratio between the electrons and the holes.
4 pages, 2 figures, to be published in Proceedings of XXXVIth Rencontres de Moriond (Jan 2001) "Electronic correlations: from Meso- to Nano-physics"

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Disordered Systems and Neural Networks

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http://salesiana.dossiersoluciones.com/handle/123456789/18576

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0111452
 http://arxiv.org/abs/cond-mat/0111452
 Electronic Correlations: from Meso- to Nanophysics (T. Martin, G. Montambaux and J. Tran Thanh Van eds.) (EDP Sciences, 2001) pp. 343.

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arXiv