Two-Dimensional Quantum Ferromagnets

Details Two-Dimensional Quantum Ferromagnets Two-Dimensional Quantum Ferromagnets

1997-10-21

arxiv.org/abs/cond-mat/9710220v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages RevTeX, references and one figure added

Scientific paper

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.

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