Rolf Menne

Max Planck Institute for Solid State Research, Stuttgart, Baden-Württemberg, Germany

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Publications (2)7.4 Total impact

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    Rolf Menne · Rolf R. Gerhardts
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    ABSTRACT: On the basis of Boltzmann's equation, and including anisotropic scattering in the collision operator, we investigate the effect of one-dimensional superlattices on two-dimensional electron systems. In addition to superlattices defined by static electric and magnetic fields, we consider mobility superlattices describing a spatially modulated density of scattering centers. We prove that magnetic and electric superlattices in $x$-direction affect only the resistivity component $\rho_{xx}$ if the mobility is homogeneous, whereas a mobility lattice in $x$-direction in the absence of electric and magnetic modulations affects only $\rho_{yy}$. Solving Boltzmann's equation numerically, we calculate the positive magnetoresistance in weak magnetic fields and the Weiss oscillations in stronger fields within a unified approach. Comment: submitted to PRB
    Preview · Article · Sep 1997 · Physical Review B
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    ABSTRACT: The magnetoresistance of a two-dimensional electron system, subjected to a one- dimensional lateral potential modulation is studied for various potential amplitudes. The interplay between Landau level splitting and modulation broadening is shown to generate a transition from even to odd filling factors for the Shubnikov–de Haas resistance minima. The effect provides a tool to determine the potential amplitude. Calculations within a one-particle model agree with this evidence of the van Hove– like structure of the Landau bands.
    Preview · Article · Jan 1997 · Physical review. B, Condensed matter