Topological oscillations of the magnetoconductance in disordered GaAs layers

Murzin, S. S.; Jansen, A. G. M.; Claus, I.

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Topological oscillations of the magnetoconductance in disordered GaAs layers

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Murzin, S. S.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Jansen, A. G. M.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Murzin, S. S., Jansen, A. G. M., & Claus, I. (2004). Topological oscillations of the magnetoconductance in disordered GaAs layers. Physical Review Letters, 92(1): 016802.

Cite as: https://hdl.handle.net/21.11116/0000-000E-F7A5-1

Abstract

Oscillatory variations of the diagonal (G(xx)) and Hall (G(xy))
magnetoconductances are discussed in view of topological scaling
effects giving rise to the quantum Hall effect. They occur in a field
range without oscillations of the density of states due to Landau
quantization, and are, therefore, totally different from the
Shubnikov-de Haas oscillations. Such oscillations are experimentally
observed in disordered GaAs layers in the extreme quantum limit of
applied magnetic field with a good description by the unified scaling
theory of the integer and fractional quantum Hall effect.