Two-Dimensional Quantum Ferromagnets
Mesoscale and Nanoscale Physics
2009-09-25 v2
Abstract
We present 1/N Schwinger boson and quantum Monte Carlo calculations of the magnetization and NMR relaxation rate for the two-dimensional ferromagnetic Heisenberg model representing a quantum Hall system at filling factor nu=1. Comparing the analytic and numerical calculations, we find that the SU(N) version of Schwinger boson theory gives accurate results for the magnetization at low temperatures, whereas the O(N) model works well at higher temperatures.
Cite
@article{arxiv.cond-mat/9710220,
title = {Two-Dimensional Quantum Ferromagnets},
author = {Carsten Timm and Patrik Henelius and Anders W. Sandvik and S. M. Girvin},
journal= {arXiv preprint arXiv:cond-mat/9710220},
year = {2009}
}
Comments
4 pages RevTeX, references and one figure added