Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 5: Transporteigenschaften

HL 5.8: Vortrag

Montag, 8. März 2004, 12:00–12:15, H14

Scattering Wavefunctions in Ballistic Rectifyers
— •Oliver Bendix, Ragnar Fleischmann, and Theo Geisel — MPI für Strömungsforschung and Institut für Nichtlineare Dynamik, Universität Göttingen, Bunsenstraße 10, 37073 Göttingen

Electron transport in mesoscopic systems in semiconductors with typical length scales shorter than the mean free path can be assumed to be ballistic. Recent experimental and theoretical work has revealed an unexpected rectification effect based on ballistic transport in mesoscopic cross-junctions with broken symmetry [1,2,3].
In our simplified model [2] a crucial role is played by the energy-dependence of the number of current-carrying modes. In a more detailed description this corresponds to the energy-dependence of the scattering coefficients. Here we present numerical results for the scattering wavefunctions in ballistic rectifyers.

A. M. Song et al., PRL 80 (1998) 3831
R. Fleischmann and T. Geisel, PRL 89 (2002) 16804
S. de Haan et al., PRL (in press)