Anomalous Even Denominator Fractional Quantum Hall Plateaus in Confined Region
2017
Induced from a 5/3 filling factor quantum Hall state in a single layer two-dimensional electron gas, unexpected even denominator plateaus quantized at (h/e^2)/(3/2) and (h/e^2)/(15/8) are observed under confinement. The quantum Hall plateaus develop below 300 mK at a local filling factor of 5/3, with a quantization of 0.04%. The formation of a 3/2 fractional quantum Hall state in the confined region is suggested as a possible explanation.
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