Persistent dynamics in the S=1/2 quasi-one-dimensional chain compound Rb4Cu(MoO4)3 probed with muon-spin relaxation

T. Lancaster; P. J. Baker; F. L. Pratt; S. J. Blundell; W. Hayes; D. Prabhakaran

doi:10.1103/PhysRevB.85.184404

Persistent dynamics in the S=1/2 quasi-one-dimensional chain compound Rb4Cu(MoO4)3 probed with muon-spin relaxation

Strongly Correlated Electrons 2014-01-17 v1

Authors: T. Lancaster , P. J. Baker , F. L. Pratt , S. J. Blundell , W. Hayes , D. Prabhakaran

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Abstract

We report the results of muon-spin relaxation measurements on the low-dimensional antiferromagnet Rb4Cu(MoO4)3. No long-range magnetic order is observed down to 50 mK implying a ratio T_N/J<0.005 (where J is the principal exchange strength along the spin chains) and an effective ratio of interchain to intrachain exchange of |J_perp/J|<2 x 10^-3, making the material an excellent realization of a one-dimensional quantum Heisenberg antiferromagnet. We probe the persistent spin excitations at low temperatures and find that ballistic spin transport dominates the excitations detected below 0.3 K.

Keywords

muon-spin relaxation quasi-one-dimensional Heisenberg antiferromagnet Rb4Cu(MoO4)3 ballistic spin transport low-dimensional magnetism persistent spin excitations

Cite

@article{arxiv.1203.1161,
  title  = {Persistent dynamics in the S=1/2 quasi-one-dimensional chain compound Rb4Cu(MoO4)3 probed with muon-spin relaxation},
  author = {T. Lancaster and P. J. Baker and F. L. Pratt and S. J. Blundell and W. Hayes and D. Prabhakaran},
  journal= {arXiv preprint arXiv:1203.1161},
  year   = {2014}
}

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4 pages, 3 figures

Persistent dynamics in the S=1/2 quasi-one-dimensional chain compound Rb4Cu(MoO4)3 probed with muon-spin relaxation

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