NMR relaxation rates in spin-1/2 antiferromagnetic chains

V. Barzykin

doi:10.1103/PhysRevB.63.140412

NMR relaxation rates in spin-1/2 antiferromagnetic chains

Strongly Correlated Electrons 2009-10-31 v1 Statistical Mechanics

Authors: V. Barzykin

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Abstract

We consider the low-temperature behavior of NMR relaxation rates $T_1$ and $T_{2G}$ in the spin-1/2 antiferromagnetic chain. We find that $T_1 \propto const$ and $T_{2G} \propto \sqrt{T}$ , with logarithmic corrections. We determine both constants and logarithmic terms by matching perturbative RG with exact results, so that the final expressions for the relaxation rates do not contain any free parameters. Our theoretical results are in excellent agreement with NMR experiments in Sr $_2$ CuO $_3$ .

Keywords

spin relaxation

Cite

@article{arxiv.cond-mat/0011453,
  title  = {NMR relaxation rates in spin-1/2 antiferromagnetic chains},
  author = {V. Barzykin},
  journal= {arXiv preprint arXiv:cond-mat/0011453},
  year   = {2009}
}

Comments

8 pages, 2 figures

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