Zusammenfassung: |
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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Lizenzbestimmungen: |
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2004 |
Schlagwörter (englisch): |
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
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Fachliche Zuordnung (DDC): |
530 | Physik
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