Theory of Nuclear Magnetic Relaxation in Haldane Gap Antiferromagnets
Jacob Sagi, Ian Affleck
TL;DR
This paper develops a theoretical framework for understanding nuclear magnetic relaxation in Haldane gap antiferromagnets, comparing different models and matching with experimental data.
Contribution
It introduces a comprehensive theoretical approach for NMR in Haldane gap antiferromagnets using multiple models and analyzes anisotropy and magnetic field effects.
Findings
Models yield similar results for NMR relaxation.
Calculated anisotropy and magnetic field dependence match experimental observations.
Provides a unified theoretical description for integer-spin 1D antiferromagnets.
Abstract
A theory of Nuclear Magnetic Resonance (NMR) is developed for integer-spin, one-dimensional antiferromagnets, which exhibit the Haldane gap. We consider free boson, free fermion and non-linear sigma model approaches, all of which give similar results. Detailed anisotropy and magnetic field dependence is calculated and compared with experiment.
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