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 time scale gives rise to a dynamical transition into a novel quantized Hall state. The observed Hall state is determined to be a zero...

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Bibliographic Details
Published in:Physical review letters 2003-09, Vol.91 (11), p.116804-116804, Article 116804
Main Authors: Chen, Michelle, Kang, Woowon, Wegscheider, Werner
Format: Article
Language:English
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Summary: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 time scale 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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.91.116804