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 -