TY - JOUR

T1 - Spin Polarization and [Formula presented] Factor of a Dilute GaAs Two-Dimensional Electron System

AU - Tutuc, E.

AU - Melinte, S.

AU - Shayegan, M.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - The effective [Formula presented] factor [Formula presented] of a dilute interacting two-dimensional electron system is expected to increase with respect to its bare value as the density is lowered, and to eventually diverge as the system makes a transition to a ferromagnetic state. We report here measurements of [Formula presented] in dilute (density 0.8 to [Formula presented]), high-mobility GaAs two-dimensional electrons from their spin polarization in a parallel magnetic field. The data reveal a surprising trend. While [Formula presented] is indeed significantly enhanced with respect to the band [Formula presented] factor of GaAs, the enhancement factor decreases from about 6 to 3 as the density is reduced.

AB - The effective [Formula presented] factor [Formula presented] of a dilute interacting two-dimensional electron system is expected to increase with respect to its bare value as the density is lowered, and to eventually diverge as the system makes a transition to a ferromagnetic state. We report here measurements of [Formula presented] in dilute (density 0.8 to [Formula presented]), high-mobility GaAs two-dimensional electrons from their spin polarization in a parallel magnetic field. The data reveal a surprising trend. While [Formula presented] is indeed significantly enhanced with respect to the band [Formula presented] factor of GaAs, the enhancement factor decreases from about 6 to 3 as the density is reduced.

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U2 - 10.1103/PhysRevLett.88.036805

DO - 10.1103/PhysRevLett.88.036805

M3 - Article

C2 - 11801080

AN - SCOPUS:85038288665

VL - 88

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 3

ER -