Spin susceptibility of two-dimensional electrons in narrow AlAs quantum wells

Details Spin susceptibility of two-dimensional electrons in narrow AlAs quantum wells Spin susceptibility of two-dimensional electrons in narrow AlAs quantum wells

2004-03-07

arxiv.org/abs/cond-mat/0403191v2

Phys. Rev. Lett. 92, 226401 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 4 figures. Dotted line added to Fig. 4(a) to clarify the QMC calculation

Scientific paper

10.1103/PhysRevLett.92.226401

We report measurements of the spin susceptibility in dilute two-dimensional electrons confined to a 45$\AA$ wide AlAs quantum well. The electrons in this well occupy an out-of-plane conduction-band valley, rendering a system similar to two-dimensional electrons in Si-MOSFETs but with only one valley occupied. We observe an enhancement of the spin susceptibility over the band value that increases as the density is decreased, following closely the prediction of quantum Monte Carlo calculations and continuing at finite values through the metal-insulator transition.

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