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 Publish in OALib Journal ISSN: 2333-9721 APC: Only $99  Views Downloads  Relative Articles Custodial SU(2) Violation and the Origin of Fermion Masses On the Origin of Fermion Masses Introduction to Theories of Fermion Masses FERMION MASSES IN EXTENDED TECHNICOLOUR Fermion Masses in Superstring Theory Testing Theories of Fermion Masses Effects of fermion exchanges on the polarization of exciton condensates Fermion masses and symmetry breaking of a U(2) flavour symmetry Fermion Masses in SO(10) Interaction dependence of composite fermion effective masses More... Physics 2001 # Measurements of the Composite Fermion masses from the spin polarization of 2-D electrons in the region$1<ν<2\$

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Abstract:

Measurements of the reflectivity of a 2-D electron gas are used to deduce the polarization of the Composite Fermion hole system formed for Landau level occupancies in the regime 1<\nu<2. The measurements are consistent with the formation of a mixed spin CF system and allow the density of states or `polarization' effective mass of the CF holes to be determined. The mass values at \nu=3/2 are found to be ~1.9m_{e} for electron densities of 4.4 x 10^{11} cm^{-2}, which is significantly larger than those found from measurements of the energy gaps at finite values of effective magnetic field.

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