Bloch oscillations, Zener tunneling and Wannier-Stark ladders in the time-domain

Details Bloch oscillations, Zener tunneling and Wannier-Stark ladders in the time-domain Bloch oscillations, Zener tunneling and Wannier-Stark ladders in the time-domain

1994-10-31

arxiv.org/abs/cond-mat/9410114v1

Physics

Condensed Matter

4 pages, 6 PostScript figures available from antti@mic.dth.dk, REVTEX 3.0

Scientific paper

10.1103/PhysRevLett.74.1831

We present a time-domain analysis of carrier dynamics in a semiconductor superlattice with two minibands. Integration of the density-matrix equations of motion reveals a number of new features: (i) for certain values of the applied static electric field strong interband transitions occur; (ii) in static fields the complex time-dependence of the density-matrix displays a sequence of stable plateaus in the low field regime, and (iii) for applied fields with a periodic time-dependence the dynamic response can be understood in terms of the quasienergy spectra.

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