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

I. Varga·C. Schlichenmaier·T. Meier·K. Maschke·P. Thomas·S. W. Koch
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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 $τ$ 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.

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I. Varga, C. Schlichenmaier, T. Meier, K. Maschke, P. Thomas, S. W. Koch. 2001-11-23. Dynamics of Coulomb-correlated electron-hole pairs in disordered semiconductor nanowires. https://arxiv.org/abs/cond-mat/0111452

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