Abstract
We investigate the electron spin states in the bilayer quantum Hall system at total Landau level filling factor exploiting current-pumped and resistively detected NMR. The measured Knight shift, , of 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.
- Received 15 January 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.076805
©2007 American Physical Society