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-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.
Chen
Michelle
M
James Franck Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
Kang
Woowon
W
Wegscheider
Werner
W