The absolute spin polarization of a two-dimensional electron gas has been measured as a function of temperature at the (Formula presented) quantum Hall state by magnetoabsorption spectroscopy. We find that the electrons become fully polarized as (Formula presented) and that the loss of spin polarization over the temperature regime of 500 mK to 12 K is consistent with a recently proposed continuum quantum ferromagnet model of the spin thermodynamics of the (Formula presented) quantum Hall effect state.
|Physical Review B - Condensed Matter and Materials Physics
|Published - 1996
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics