Spin-Excitation-Instability-Induced Quantum Phase Transitions in Double-Layer Quantum Hall Systems
Mesoscale and Nanoscale Physics
2009-10-28 v2
Abstract
We study intersubband spin density collective modes in double-layer quantum Hall systems at within the time-dependent Hartree-Fock approximation. We find that these intersubband spin density excitations may soften under experimentally accessible conditions, signaling a phase transition to a new quantum Hall state with interlayer inplane antiferromagnetic spin correlations. We show that this novel canted antiferromagnetic phase is energetically stable and that the phase transition is continuous.
Keywords
Cite
@article{arxiv.cond-mat/9605124,
title = {Spin-Excitation-Instability-Induced Quantum Phase Transitions in Double-Layer Quantum Hall Systems},
author = {Lian Zheng and R. J. Radtke and S. Das Sarma},
journal= {arXiv preprint arXiv:cond-mat/9605124},
year = {2009}
}
Comments
Revised final version to appear in Phys. Rev. Lett