Topological defects and Goldstone excitations in domain walls between ferromagnetic quantum Hall effect liquids
Mesoscale and Nanoscale Physics
2009-10-31 v1 Disordered Systems and Neural Networks
Abstract
It is shown that the low-energy spectrum of a ferromagnetic quantum Hall effect liquid in a system with a multi-domain structure generated by an inhomogeneous bare Zeeman splitting is formed by excitations localized at the walls between domains. For a step-like , the domain wall spectrum includes a spin-wave with a linear dispersion and a small gap due to spin-orbit coupling, and a low-energy topological defects. The latter are charged and may dominate in the transport under conditions that the percolation through the network of domain walls is provided.
Cite
@article{arxiv.cond-mat/9901053,
title = {Topological defects and Goldstone excitations in domain walls between ferromagnetic quantum Hall effect liquids},
author = {Vladimir I. Fal'ko and S. V. Iordanskii},
journal= {arXiv preprint arXiv:cond-mat/9901053},
year = {2009}
}
Comments
4 pages, 1 fig