Abstract
We perform transport experiments in the quantum Hall regime on transmission through a barrier region exhibiting a fractional quantum Hall effect. For transmission from the ν=1 effect through a barrier at the 2 3 effect, the transmission probability is 2 3 (0.998±.005) and the reflection is 1 3 (.983±.010). Interpreted in terms of conduction via edge states, our results yield a quasi-particle charge of −e 3 ±2% in the 2 3 effect in one picture, and a reduction in the single-particle density of states in another. Data on transmission from the 2 3 effect through a barrier at 1 3 are consistent with these interpretations.
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