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

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

2001-04-23

arxiv.org/abs/cond-mat/0104429v1

PRL 86, 5566 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.86.5566

We measure the Hall conductivity, $\sigma_{xy}$, 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 $\sigma_{xy}$ 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 $\sigma_{xy}$ quantization.

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