Phys. Rev. Lett. 92, 226401 (2004) [4 pages]Spin Susceptibility of Two-Dimensional Electrons in Narrow AlAs Quantum WellsReceived 21 October 2003; published 1 June 2004 We report measurements of the spin susceptibility in dilute two-dimensional electrons confined to a 45 Å 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.226401
DOI:
10.1103/PhysRevLett.92.226401
PACS:
71.70.Ej, 73.43.Qt, 73.50.–h
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