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.
Domaines
Physique [physics]
Origine : Fichiers produits par l'(les) auteur(s)