Dynamics of Coulomb-correlated electron-hole pairs in disordered semiconductor nanowires
Abstract
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 $\tau$ produces an intraband echo phenomenon $2\tau$ time later. The echo current is shown to depend on the mass ratio between the electrons and the holes.
- Publication:
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arXiv e-prints
- Pub Date:
- November 2001
- DOI:
- 10.48550/arXiv.cond-mat/0111452
- arXiv:
- arXiv:cond-mat/0111452
- Bibcode:
- 2001cond.mat.11452V
- Keywords:
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- Condensed Matter - Disordered Systems and Neural Networks
- E-Print:
- 4 pages, 2 figures, to be published in Proceedings of XXXVIth Rencontres de Moriond (Jan 2001) "Electronic correlations: from Meso- to Nano-physics"