Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metamorphosis of the Quantum Hall Ferromagnet at $\nu = 2/5$   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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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
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The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: stat