17O NMR Study of the Intrinsic Magnetic Susceptibility and Spin Dynamics of the Quantum Kagome Antiferromagnet ZnCu3 OH 6 Cl2

Aretha Olariu, Philippe Mendels, Fabrice Bert, Fabienne Duc, Mark A. de Vries, Andrew Harrison

Research output: Contribution to journalArticlepeer-review

Abstract

We report, through 17O NMR, an unambiguous local determination of the intrinsic kagome lattice spin susceptibility as well as that created around nonmagnetic defects arising from natural Zn/Cu exchange in the S=1/2 (Cu2+) herbertsmithite ZnCu3 OH 6 Cl2 compound. The issue of a singlet–triplet gap is addressed. The magnetic response around a defect is found to markedly differ from that observed in nonfrustrated antiferromagnets. Finally, we discuss our relaxation measurements in the light of Cu and Cl NMR data and suggest a flat q dependence of the excitations.
Original languageEnglish
Article number087202
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume100
Issue number8
DOIs
Publication statusPublished - 28 Feb 2008

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