FRACTIONAL QUANTUM HALL-EFFECT AROUND NU=3 2 - COMPOSITE FERMIONS WITH A SPIN/

Angular dependent magnetotransport measurements on the fractional quan tum Hall (FQHE) states around Landau level filling factor v = 3/2 are explained very effectively in terms of composite fermions (CFs) with a spin. The disappearance and reappearance of FQHE states as well as th eir spin polarization is deduced from a simple ''Landau level'' fan di agram for CFs. While the ''Landau splitting'' scales with effective ma gnetic field, with its origin at v = 3/2 the spin-splitting scales wit h total external magnetic field having Its origin at B = 0. The g fact or of a CF is largely the g factor of the electron.