Electron spin polarization by isospin ordering in correlated two-layer quantum Hall systems
Strongly Correlated Electrons
2015-04-30 v1 Mesoscale and Nanoscale Physics
Abstract
Enhancement of the electron spin polarization in a correlated two-layer two-dimensional electron system at a total Landau level filling factor of one is reported. Using resistively detected nuclear magnetic resonance, we demonstrate that the electron spin polarization of two closely-spaced two-dimensional electron systems becomes maximized when inter-layer Coulomb correlations establish spontaneous isospin ferromagnetic order. This correlation-driven polarization dominates over the spin polarizations of competing single-layer fractional Quantum Hall states under electron density imbalances.
Keywords
Cite
@article{arxiv.1504.02007,
title = {Electron spin polarization by isospin ordering in correlated two-layer quantum Hall systems},
author = {L. Tiemann and W. Wegscheider and M. Hauser},
journal= {arXiv preprint arXiv:1504.02007},
year = {2015}
}
Comments
to be published in Physical Review Letters