Spin dynamics in the S =1/2 kagome compound vesignieite, Cu3Ba(VO5H)2
| Autor: | Colman, Ross H, Bert, Fabrice, Boldrin, David, Hillier, Adrian D, Chapon, Laurent C, Manuel, Pascal, Mendels, Phillipe, Wills, Andrew S |
|---|---|
| Rok vydání: | 2011 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.83.180416 |
| Popis: | We report the study of high quality samples of the frustrated S = 1/2 kagome antiferromagnet vesignieite, Cu3Ba(VO5H)2. Neutron powder diffraction measurements evidence the high quality of the kagome lattice and show no sign of a transition to 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 MuSR. Our results point to an exotic quantum state below 9 K with coexistance of both dynamical and small frozen moments \sim 0.1 \muB. We propose that Dzyaloshinsky-Moriya interaction is large enough in this system to stabilize this novel quantum ground state. Comment: 4 pages, 5 figures, To be published in Physical Review B Rapid Commun |
| Databáze: | arXiv |
| Externí odkaz: |
|