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- W2038403604 abstract "The ordering of weakly coupled random antiferromagnetic $S=1/2$ chains, as relevant for the recent experimentally investigated spin chain materials, is considered theoretically. The one-dimensional isotropic Heisenberg model with random exchange interactions is treated numerically on finite chains with the density-matrix renormalization-group approach as well as with the standard renormalization analysis, both within the mean-field approximation for interchain coupling ${J}_{ensuremath{perp}}$. Results for the ordering temperature ${T}_{N}$ and for the ordered moment ${m}_{0}$ are presented and are both reduced with increasing disorder, agreeing with the experimental observations. The most pronounced effect of the random singlet concept appears to be a very large span of local ordered moments, becoming wider with decreasing ${J}_{ensuremath{perp}}$, consistent with the $ensuremath{mu}$-SR experimental findings." @default.
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- W2038403604 date "2015-04-27" @default.
- W2038403604 modified "2023-10-16" @default.
- W2038403604 title "Antiferromagnetic order in weakly coupled random spin chains" @default.
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- W2038403604 doi "https://doi.org/10.1103/physrevb.91.155147" @default.
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