Metamorphosis of the Quantum Hall Ferromagnet at $ν= 2/5$

Details Metamorphosis of the Quantum Hall Ferromagnet at $ν= 2/5$ Metamorphosis of the Quantum Hall Ferromagnet at $ν= 2/5$

2003-07-29

arxiv.org/abs/cond-mat/0307711v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures. to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.91.116804

We report on the dramatic evolution of the quantum Hall ferromagnet in the fractional quantum Hall regime at $\nu = 2/5$ 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 $\nu = 2/5$ fractional quantum Hall states. It is characterized by a strong temperature dependence and puzzling correlation between temperature and time.

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