Local Spin Susceptibility of the S=1/2 Kagome Lattice in ZnCu3(OD)6Cl2

Details Local Spin Susceptibility of the S=1/2 Kagome Lattice in ZnCu3(OD)6Cl2 Local Spin Susceptibility of the S=1/2 Kagome Lattice in ZnCu3(OD)6Cl2

2011-03-12

arxiv.org/abs/1103.2457v2

Physical Review B 84, 020411(R), (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 figures; published in PR-B Rapid Communications

Scientific paper

10.1103/PhysRevB.84.020411

We report single-crystal 2-D NMR investigation of the nearly ideal spin S=1/2 kagome lattice ZnCu3(OD)6Cl2. We successfully identify 2-D NMR signals originating from the nearest-neighbors of Cu2+ defects occupying Zn sites. From the 2-D Knight shift measurements, we demonstrate that weakly interacting Cu2+ spins at these defects cause the large Curie-Weiss enhancement toward T=0 commonly observed in the bulk susceptibility data. We estimate the intrinsic spin susceptibility of the kagome planes by subtracting defect contributions, and explore several scenarios.

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