Abstract
Microwave Hall effect experiments confirm the d.c. results regarding the integral quantum Hall effect (IQHE). They also give additional information on the intrinsic plateau width in σxy, on the behavior at the spin resonance, and on the importance of sample edges, as well as an indication for the breakdown of the IQHE at frequencies lower than the cyclotron resonance frequency. The numerical value of the microwave Hall conductivity on the i=4 plateau agrees with the value obtained from the d.c. Hall resistance. Experiments on micron-size structures demonstrate that the Hall effect in particular the IQHE can be measured on “small” samples without potential probes perturbing the low-dimensionality of the electron gas.
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