NMR evidence for spin canting in a bilayer ν=2 quantum hall system

N. Kumada, K. Muraki, Y. Hirayama

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We investigate the electron spin states in the bilayer quantum Hall system at total Landau level filling factor ν=2 exploiting current-pumped and resistively detected NMR. The measured Knight shift, KS, of As75 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.

Original languageEnglish
Article number076805
JournalPhysical Review Letters
Issue number7
Publication statusPublished - 2007 Aug 17


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