Observation of a Fractional Quantum Hall State at $\nu =1/4$ in a Wide GaAs Quantum Well

D. R. Luhman, W. Pan, D. C. Tsui +3

We report the observation of an even-denominator fractional quantum Hall (FQH) state at $\nu =1/4$ in a high quality, wide GaAs quantum well. The sample has a quantum well width of 50…