Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-03-06
Phys. Rev. Lett. 100 (2008) 077203
Physics
Condensed Matter
Strongly Correlated Electrons
Phys. Rev. Lett. (in press)
Scientific paper
10.1103/PhysRevLett.100.077203
ZnCu$_{3}$(OH)$_{6}$Cl$_{2}$ ($S=1/2$) is a promising new candidate for an ideal Kagom\'e Heisenberg antiferromagnet, because there is no magnetic phase transition down to $\sim$50 mK. We investigated its local magnetic and lattice environments with NMR techniques. We demonstrate that the intrinsic local spin susceptibility {\it decreases} toward T=0, but that slow freezing of the lattice near $\sim$50 K, presumably associated with OH bonds, contributes to a large increase of local spin susceptibility and its distribution. Spin dynamics near T=0 obey a power-law behavior in high magnetic fields.
Bartlett Bart M.
Imai Takayuki
Nocera Daniel G.
Nytko Emily A.
Shores Matthew P.
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