NMR Evidence for Spin Canting in a Bilayer nu = 2 Quantum Hall System

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, KS, 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.

Accepted for Phys. Rev. Lett

References in corpus (1)

• Magnetotransport Study of the Canted Antiferromagnetic Phase in Bilayer $\nu =2$ Quantum Hall State

Cited by in corpus (8)

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• The Study of Goldstone Modes in $\nu$=2 Bilayer Quantum Hall Systems
• Nuclear Magnetometry Study of Spin Dynamics in Bilayer Quantum Hall Systems
• Spatial gradient of dynamic nuclear spin polarization induced by breakdown of quantum Hall effect
• Evidence of inter-layer interaction in magneto-luminescence spectra of electron bilayers