Quantum Impurities in the Two-Dimensional Spin One-Half Heisenberg Antiferromagnet

Details Quantum Impurities in the Two-Dimensional Spin One-Half Heisenberg Antiferromagnet Quantum Impurities in the Two-Dimensional Spin One-Half Heisenberg Antiferromagnet

2002-03-06

arxiv.org/abs/cond-mat/0203141v1

Science 295, 1691 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 3 figures. NOTE: possible errors in PDF version of Fig. 1. View postscript version of figure if possible

Scientific paper

10.1126/science.1067110

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 La2Cu(1-z)(Zn,Mg)zO4 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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