Hund's Rule for Composite Fermions
J. K. Jain, X. G. Wu
Abstract
We consider the ``fractional quantum Hall atom" in the vanishing Zeeman energy limit, and investigate the validity of Hund's maximum-spin rule for interacting electrons in various Landau levels. While it is not valid for electrons in the lowest Landau level, there are regions of filling factors where it predicts the ground state spin correctly provided it is applied to composite fermions. The composite fermion theory also reveals a ``self-similar" structure in the filling factor range 4/3>ν>2/3.
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