Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-01-11
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 2 eps figures, to appear in PRL
Scientific paper
10.1103/PhysRevLett.90.056805
We determine the spin susceptibility in a two dimensional electron system in GaAs/AlGaAs over a wide range of low densities from 2$\times10^{9}$cm$^{-2}$ to 4$\times10^{10}$cm$^{-2}$. Our data can be fitted to an equation that describes the density dependence as well as the polarization dependence of the spin susceptibility. It can account for the anomalous g-factors reported recently in GaAs electron and hole systems. The paramagnetic spin susceptibility increases with decreasing density as expected from theoretical calculations.
Baldwin Kirk W.
Pfeiffer Loren N.
Stormer Horst L.
West Ken. W.
Zhu Jia-Ji
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