HUND RULE FOR COMPOSITE FERMIONS

We consider the ''fractional quantum Hall atom'' in the vanishing Zeem an energy limit, and investigate the validity of Hund's maximum-spin r ule for interacting electrons in various Landau levels. While it is no t valid for electrons in the lowest Landau level, it generally predict s 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 > upsilon > 2/3.