Journal
PHYSICAL REVIEW B
Volume 84, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.180401
Keywords
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Funding
- NSERC
- [ANR-09-JCJC-0093-01]
- Engineering and Physical Sciences Research Council [957070] Funding Source: researchfish
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The intrinsic magnetic susceptibility and local magnetization of the near-kagome quantum magnet vesignieite, Cu3BaV2O8(OH)(2), are presented as measured using V-51 NMR. The NMR line shift gives an accurate measurement of the intrinsic susceptibility of the kagome sites which closely resembles that of the quantum spin liquid herbertsmithite [A. Olariu et al., Phys. Rev. Lett. 100, 087202 (2008)]. It is therefore surprising that, at T-C similar or equal to 9K, a transition to a heterogeneous ground state is observed. A gradual wipeout of half the NMR intensity indicates a slowly fluctuating spin liquid component, and a detailed analysis of the linewidth reveals the onset of static magnetism at the remaining half of the sites. It is proposed that this transition and unusual ground state originate from a nearby quantum critical point induced by the Dzyaloshinskii-Moriya interaction.
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