Nuclear relaxation in the spin-1/2 antiferromagnetic chain compound Sr_2CuO_3 --- comparison between theories and experiments
Abstract
The NMR relaxation data on Sr_2CuO_3 [Phys. Rev. Lett. 76, 4612 (1996)] are reexamined and compared with the analytic theory of the dynamic susceptibility in the S=1/2 antiferromagnetic Heisenberg chain including multiplicative logarithmic corrections [Phys. Rev. Lett. 78, 539 (1997); cond-mat/9610015]. Comparisons of the spin-lattice and the gaussian spin-echo decay rates (1/T_1 and 1/T_{2G}) and their ratio all show good quantitative agreement. Our results demonstrate the importance of the logarithmic corrections in the analysis of experimental data for quasi-1D systems and indicate that the dynamics of Sr_2CuO_3 is well described by a S=1/2 one-dimensional Heisenberg model with a nearest neighbor exchange.
Keywords
Cite
@article{arxiv.cond-mat/9706177,
title = {Nuclear relaxation in the spin-1/2 antiferromagnetic chain compound Sr_2CuO_3 --- comparison between theories and experiments},
author = {M. Takigawa and O. A. Starykh and A. W. Sandvik and R. R. P. Singh},
journal= {arXiv preprint arXiv:cond-mat/9706177},
year = {2009}
}
Comments
8 pages, RevTex, 3 postscript figures