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Updated: Jul 20, 2026

Advanced Compositional Analysis of Nanoparticle-polymer Composites Using Direct Fluorescence Imaging
Published on: July 19, 2016
NMR investigation of how free composite fermions are at nu=1 / 2
N Freytag1, M Horvatić, C Berthier
1Grenoble High Magnetic Field Laboratory, MPI-FKF and CNRS, B.P. 166, France. N.Freytag@fkf.mpg.de
Abstract:
NMR measurements of the electron spin polarization (P) have been performed on a 2D electron system at and around half-filled lowest Landau level. Comparing the magnetic field and the temperature dependence of P to models of free and interacting composite fermions (CF), the imbalance of spin-up and spin-down CF Fermi seas is mapped as a function of Zeeman energy. Independent measurements of the CF effective mass, g factor, and Fermi energy are obtained from the thermal activation of P in tilted fields. The filling factor dependence of the P for 2 / 5
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