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

Original · EN

We measure the Hall conductivity, σxy, 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 σxy 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 σxy quantization.