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  • Title: NMR evidence for spin canting in a bilayer nu=2 quantum hall system.
    Author: Kumada N, Muraki K, Hirayama Y.
    Journal: Phys Rev Lett; 2007 Aug 17; 99(7):076805. PubMed ID: 17930917.
    Abstract:
    We investigate the electron spin states in the bilayer quantum Hall system at total Landau level filling factor nu=2 exploiting current-pumped and resistively detected NMR. The measured Knight shift, K(S), of 75As nuclei reveals continuous variation of the out-of-plane electronic spin polarization between nearly full and zero as a function of density imbalance. Nuclear spin relaxation measurements indicate a concurrent development of an in-plane spin component. These results provide direct information on the spin configuration in this system and comprise strong evidence for the spin canting suggested by previous experiments.
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