Publication details for Professor Tom LancasterLancaster, T., Baker, P.J., Pratt, F.L., Blundell, S.J., Hayes, W. & 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): 184404.
- Publication type: Journal Article
- ISSN/ISBN: 1098-0121, 1550-235X
- DOI: 10.1103/PhysRevB.85.184404
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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.