Abstract
Spin polarization of the ``second-generation'' ${\ensuremath{\nu}}_{e}=4∕11$ fractional quantum Hall state (corresponding to an incompressible liquid in a one-third-filled composite fermion Landau level) is studied by exact diagonalization. A spin phase diagram is determined for GaAs structures of different widths and electron concentrations. Transition between the polarized and partially unpolarized states with distinct composite fermion correlations is predicted for realistic parameters.
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