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

Dolgopolov, V. T.; Shashkin, A. A.; Broto, J. M.; Rakoto, H.; Askenazy, S.

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

Authors

Description

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.
4 pages, 4 figures, submitted to PRL