Abstract
We have measured the capacitance between adjacent edge channels (C M) in the GaAs/AlGaAs two dimensional electron gas under the quantum Hall plateau condition to investigate the structure of edge channels. The value of C M is determined by the energy relaxation length of adjacent edge channels and the ratio of edge channel width to the separation between them. The separation lengths between the adjacent edge channels at ν=2 and 4 have been estimated from the information of both C M and the total width of edge channels.
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