Quantum impurities in the two-dimensional spin one-half Heisenberg antiferromagnet.

Abstract

The study of randomness in low-dimensional quantum antiferromagnets is at the forefront of research in the field of strongly correlated electron systems, yet there have been relatively few experimental model systems. Complementary neutron scattering and numerical experiments demonstrate that the spin-diluted Heisenberg antiferromagnet La2Cu1-z(Zn,Mg)(z)O4 is an excellent model material for square-lattice site percolation in the extreme quantum limit of spin one-half. Measurements of the ordered moment and spin correlations provide important quantitative information for tests of theories for this complex quantum-impurity problem.

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Cite this paper

@article{Vajk2002QuantumII, title={Quantum impurities in the two-dimensional spin one-half Heisenberg antiferromagnet.}, author={Owen P. Vajk and P. K. Mang and Martin Greven and Peter M. Gehring and Jeffrey W Lynn}, journal={Science}, year={2002}, volume={295 5560}, pages={1691-5} }