Metamorphosis of the Quantum Hall Ferromagnet at = 2/5
Abstract
We report on the dramatic evolution of the quantum Hall ferromagnet in the fractional quantum Hall regime at = 2/5 filling. A large enhancement in the characteristic timescale gives rise to a dynamical transition into a novel quantized Hall state. The observed Hall state is determined to be a zero-temperature phase distinct from the spin-polarized and spin-unpolarized = 2/5 fractional quantum Hall states. It is characterized by a strong temperature dependence and puzzling correlation between temperature and time.
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