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Motion of wave fronts in semiconductor superlattices

Carpio Rodríguez, Ana María and Bonilla , L.L. and Dell’Acqua, G. (2001) Motion of wave fronts in semiconductor superlattices. Physical Review E, 64 (3). ISSN 1539-3755

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Abstract

An analysis of wave front motion in weakly coupled doped semiconductor superlattices is presented. If a dimensionless doping is sufficiently large, the superlattice behaves as a discrete system presenting front propagation failure and the wave fronts can be described near the threshold currents J(i) (i= 1,2) at which they depin and move. The wave front velocity scales with current as \J-J(i)\(1/2). If the dimensionless doping is low enough, the superlattice behaves as a continuum system and wave fronts are essentially shock waves whose velocity obeys an equal area rule.

Item Type:Article
Uncontrolled Keywords:Gaas-alas superlattices; Electrtic-field domains; Charge-density waves; Boundary-conditions; Propagation; Oscillations; Dynamics; Systems; Chaos
Subjects:Sciences > Physics > Mathematical physics
ID Code:15056
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