Direct measurement of the g factor of composite fermions

Schulze-Wischeler, F.; Mariani, E.; Hohls, Frank; Haug, Rolf J.

Original version

Schulze-Wischeler, F.; Mariani, E.; Hohls, F.; Haug, R.J.: Direct measurement of the g factor of composite fermions. In: Physical Review Letters 92 (2004), Nr. 15, 156401. DOI: https://doi.org/10.1103/PhysRevLett.92.156401

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/2889

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Abstract:
The activation gap δ of the fractional quantum Hall states was measured as a function of the perpendicular magnetic field. A linear dependence of δ on magnetic field was observed while approaching the spin-polarization transition. Composite fermions (CF) were introduced via the Chern-Simons gauge transformation on the many-electron wave function. The sharp linear magnetic field scaling of δ while approaching the spin-polarization transition yields a direct measurement of the CF 'g' factor alone.
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Publication type:	Article
Publishing status:	publishedVersion
Publication date:	2004
Keywords english:	Cyclotrons, Degrees of freedom (mechanics), Fermions, Ground state, Hall effect, Heterojunctions, Magnetic field effects, Permittivity, Photoconductivity, Polarization, Composite fermions (CF), Landau levels, Quasiparticles, Spin polarization, Quantum theory
DDC:	530 \| Physik