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Spin-liquid ground state in the frustrated kagome antiferromagnet MgCu3(OH)6Cl2

E. Kermarrec, P. Mendels, F. Bert, R. H. Colman, A. S. Wills, P. Strobel, P. Bonville, A. Hillier, and A. Amato
Phys. Rev. B 84, 100401(R) – Published 6 September 2011
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Abstract

We report muon spin resonance experiments on MgxCu4x(OH)6Cl2 with x1, a material isostructural to Herbertsmithite exhibiting regular kagome planes of S=12 ions (Cu2+), and therefore a candidate for a spin-liquid ground state. We evidence the absence of any magnetic ordering down to 20 mK (J/104). We present 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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  • Received 20 July 2011

DOI:https://doi.org/10.1103/PhysRevB.84.100401

©2011 American Physical Society

Authors & Affiliations

E. Kermarrec1, P. Mendels1, F. Bert1, R. H. Colman2, A. S. Wills2, P. Strobel3, P. Bonville4, A. Hillier5, and A. Amato6

  • 1Laboratoire de Physique des Solides, Université Paris Sud, UMR CNRS 8502, F-91405 Orsay, France
  • 2University College London, Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
  • 3Institut Néel, Université Joseph Fourier, CNRS, F-38042 Grenoble, France
  • 4Service de Physique de l’État Condensé, CEA-CNRS, CE-Saclay, F-91191 Gif-Sur-Yvette, France
  • 5ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 OQX, United Kingdom
  • 6Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

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Issue

Vol. 84, Iss. 10 — 1 September 2011

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