Effects of edge disorder in nano-scale antiferromagnetic clusters

Details Effects of edge disorder in nano-scale antiferromagnetic clusters Effects of edge disorder in nano-scale antiferromagnetic clusters

2010-04-29

arxiv.org/abs/1004.5314v1

Phys. Rev. B 82, 012401 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.82.012401

We study the distribution of local magnetic susceptibilities in the two-dimensional antiferromagnetic S=1/2 Heisenberg model on various random clusters, in order to determine whether effects of edge disorder could be detected in NMR experiments (through the line shape, as given by the distribution of local Knight shifts). Although the effects depend strongly on the nature of the edge and the cluster size, our results indicate that line widths broader than the average shift should be expected even in clusters as large as $\approx 1000$ lattice spacing in diameter. Experimental investigations of the NMR line width should give insights into the magnetic structure of the edges.

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