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

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

2007-07-10

arxiv.org/abs/0707.1359v1

Phys. Rev. Lett. 99, 076805 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.99.076805

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.

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