Impurity spin dynamics in 2D antiferromagnets and superconductors

Details Impurity spin dynamics in 2D antiferromagnets and superconductors Impurity spin dynamics in 2D antiferromagnets and superconductors

2000-02-20

arxiv.org/abs/cond-mat/0002316v1

Physica C 341-348, 327 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 1 fig. Proceedings of the M2S-HTSC-VI conference, Houston 2000, submitted to Physica C. More details can be found in

Scientific paper

We discuss the universal theory of localized impurities in the paramagnetic state of 2D antiferromagnets where the spin gap is assumed to be significantly smaller than a typical exchange energy. We study the impurity spin susceptibility near the host quantum transition from a gapped paramagnet to a Neel state, and we compute the impurity-induced damping of the spin-1 mode of the gapped antiferromagnet. Under suitable conditions our results apply also to d-wave superconductors.

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