M. A. Mueed, D. Kamburov, S. Hasdemir, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin
Published 2015-04-29Version 1
We observe geometric resonance features of composite fermions on the flanks of the even denominator {\nu} = 1/2 fractional quantum Hall state in high-mobility two-dimensional electron and hole systems confined to wide GaAs quantum wells and subjected to a weak, strain-induced, unidirectional periodic potential modulation. The features provide a measure of how close to {\nu} = 1/2 the system stays single-component and supports a composite fermion Fermi sea before transitioning into a {\nu} = 1/2 fractional quantum Hall state, presumably the two-component {\Psi}331 state.
Collapse of the fractional quantum Hall state by a unidirectional periodic potential modulation
Evolution of the 7/2 fractional quantum Hall state in two-subband systems
The $ν=5/2$ Fractional Quantum Hall State in the Presence of Alloy Disorder
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