Reduction of Spin Polarization near Landau Filling Factor {nu} = 3 in GaAs/AlGaAs Quantum Wells

Journal Article · Mon Mar 01 00:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.82.2768· OSTI ID:335619

Song, Y; Goodson, B M ^[1]; Maranowski, K; Gossard, A C ^[2]

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1. Materials Sciences Division, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720 (United States)
2. Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106 (United States)

{sup 71}Ga NMR spectroscopy was performed on GaAs/AlGaAs quantum wells to measure the electron spin polarization for Landau filling factors 0.7{le}{nu}{le}3.5 . A reduction of the spin polarization was observed when {nu} deviated from 3, suggesting that the effective spin of the charged excitations in the quantum wells was larger than that of a single electron. This finding may be evidence of Skyrmion excitations for {nu}=3 . {copyright} {ital 1999} {ital The American Physical Society}

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 335619
• Journal Information: Physical Review Letters, Vol. 82, Issue 13; Other Information: PBD: Mar 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
NUCLEAR MAGNETIC RESONANCE
GALLIUM ARSENIDES
ALUMINIUM ARSENIDES
NMR SPECTRA
SPIN
COLLECTIVE EXCITATIONS
POLARIZATION