Lancaster, T. and Baker, P.J. and Pratt, F.L. and Blundell, S.J. and Hayes, W. and Prabhakaran, D. (2012) 'Persistent dynamics in the S = 1/2 quasi-one-dimensional chain compound Rb4Cu(MoO4)3 probed with muon-spin relaxation.', Physical review B., 85 (18). p. 184404.
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 TN/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⊥/J | < 2 × 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.
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|Publisher Web site:||http://dx.doi.org/10.1103/PhysRevB.85.184404|
|Publisher statement:||© 2012 American Physical Society|
|Date accepted:||No date available|
|Date deposited:||05 February 2014|
|Date of first online publication:||May 2012|
|Date first made open access:||No date available|
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