Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-10-20
Phys. Rev. Lett. 98, 077204 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
Minor changes in the text and fig. 3 and fig.4. Corresponding author: P. Mendels, mendels@lps.u-psud.fr
Scientific paper
10.1103/PhysRevLett.98.077204
We report MuSR measurements on the S=1/2 (Cu2+) paratacamite Zn_xCu_{4-x}(OH)_6Cl_2 family. Despite a Weiss temperature of -300 K, the x=1 compound is found to have no transition to a magnetic frozen state down to 50 mK as theoretically expected for the kagome Heisenberg antiferromagnet. We find that the limit between a dynamical and a frozen inhomogeneous ground state occurs around x=0.5. For x=1, we discuss the relevance to a singlet picture.
Amato Alessandro
Baines Ch.
Bert Fabrice
de Vries Mark A.
Duc Fabienne
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