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Article Dans Une Revue Physical Review B Année : 2011

Spin-liquid ground state in the frustrated kagome antiferromagnet MgCu 3 (OH) 6 Cl 2

Résumé

We report µSR experiments on MgxCu4−x(OH)6Cl2 with x ∼ 1, a new material isostructural to Herbertsmithite exhibiting regular kagome planes of S = 1 2 ions (Cu 2+), and therefore a candidate for a spin liquid ground state. We evidence the absence of any magnetic ordering down to 20 mK (∼ J/10 4). This report presents a detailed investigation of the spin dynamics on well characterized samples in zero and applied longitudinal fields and a defect-based interpretation is proposed to explain the unconventional dynamics observed in the quantum spin liquid phase.

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hal-04312027 , version 1 (28-11-2023)

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Edwin Kermarrec, Philippe Mendels, Fabrice Bert, R. Colman, A. Wills, et al.. Spin-liquid ground state in the frustrated kagome antiferromagnet MgCu 3 (OH) 6 Cl 2. Physical Review B, 2011, 84 (10), pp.100401(R). ⟨10.1103/PhysRevB.84.100401⟩. ⟨hal-04312027⟩
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