Colman, R.H., Bert, F., Boldrin, D. , Hillier, A.D., Manuel, P., Mendels, P. and Wills, A.S. (2011) Spin dynamics in the S = 1/2 quantum kagome compound vesignieite, Cu3Ba(VO5H)2. Physical Review B, 83(18), 180416(R). (doi: 10.1103/PhysRevB.83.180416)
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Abstract
We report the study of high-quality samples of the frustrated S = 1 2 kagome antiferromagnet vesignieite, Cu 3 Ba(VO 5 H) 2 . Neutron powder diffraction measurements evidence the excellence of the kagome lattice and show no sign of a transition to magnetic long-range order. A kink in the susceptibility below T = 9 K is matched to a reduction in paramagnetic-like correlations in the diffraction data and a slowing of the spin dynamics observed by μ SR. Our results point to an exotic quantum state below 9 K with coexistence of both dynamical and small frozen moments ~ 0.1 μ B . We propose that this novel quantum ground state is stabilized by a large Dzyaloshinsky-Moriya interaction.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Boldrin, Dr David |
Authors: | Colman, R.H., Bert, F., Boldrin, D., Hillier, A.D., Manuel, P., Mendels, P., and Wills, A.S. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Physical Review B |
Publisher: | American Physical Society |
ISSN: | 1098-0121 |
ISSN (Online): | 1550-235X |
Published Online: | 31 May 2011 |
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