Scattering Mechanism in the Integer Quantum Hall Effect

  • J. Riess
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 101)


We consider a large class of two-dimensional systems of electrons in a static disorder potential and subject to an in-plane electric field and to a strong perpendicular magnetic field. The time evolution of the single-particle states is investigated. It is found that the macroscopic Hall current is carried by the non-adiabatic states and that quantum Hall behavior occurs, when the Fermi energy lies in a range of adiabatic levels. Linear response theory is inadequate to describe the quantum mechanical scattering process of bulk states in the quantum Hall regime. The general results are illustrated by an explicit weak disorder model, where the scattering process and the nature of dc-insulating and -conducting states can be understood in detail. The time evolution of a scattered Landau function is calculated numerically. It gives a striking illustration of the velocity increase, due to disorder, of the conduction electrons in the bulk of a quantum Hall system. This phenomenon leads to current compensation, which is crucial for the IQHE. It is caused by a special kind of nonclassical particle propagation, which results from the nonlinear components of the single-particle currents. We believe that our results improve the present microscopic understanding of the IQHE.


Linear Response Theory Weak Disorder Nonadiabatic Transition Quantum Hall System Classical Velocity 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • J. Riess
    • 1
  1. 1.Centre National de la Recherche ScientifiqueCentre de Recherches sur les Très Basses TempératuresGrenoble CedexFrance

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