Spin susceptibility of an ultra-low-density two-dimensional electron system.
We determine the spin susceptibility in a two-dimensional electron system in GaAs/AlGaAs over a wide range of low densities from 2x10(9) cm(-2) to 4x10(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.
Zhu
J
J
Department of Physics, Columbia University, New York, New York 10027, USA.
Stormer
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Pfeiffer
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Baldwin
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West
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