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Quantization of the Hall conductivity well beyond the adiabatic limit in pulsed magnetic fields

V. T. Dolgopolov·A. A. Shashkin·J. M. Broto·H. Rakoto·S. Askenazy
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Abstract

We measure the Hall conductivity, $σ_{xy}$, on a Corbino geometry sample of a high-mobility AlGaAs/GaAs heterostructure in a pulsed magnetic field. At a bath temperature about 80 mK, we observe well expressed plateaux in $σ_{xy}$ at integer filling factors. In the pulsed magnetic field, the Laughlin condition of the phase coherence of the electron wave functions is strongly violated and, hence, is not crucial for $σ_{xy}$ quantization.

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V. T. Dolgopolov, A. A. Shashkin, J. M. Broto, H. Rakoto, S. Askenazy. 2001-04-23. Quantization of the Hall conductivity well beyond the adiabatic limit in pulsed magnetic fields. https://doi.org/10.1103/physrevlett.86.5566

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