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.
@article{arxiv.1504.07921,
title = {Composite Fermion Geometric Resonance Near {\nu} = 1/2 Fractional Quantum Hall State},
author = {M. A. Mueed and D. Kamburov and S. Hasdemir and M. Shayegan and L. N. Pfeiffer and K. W. West and K. W. Baldwin},
journal= {arXiv preprint arXiv:1504.07921},
year = {2015}
}