Long Range Dynamics Related to Magnetic Impurity in the 2D Heisenberg Antiferromagnet
Abstract
We consider a magnetic impurity in the two-dimensional Heisenberg antifferomagnet with long range antiferromagnetic order. At low temperature the impurity magnetic susceptibility has a Curie term ( 1/T) and a logarithmic correction ( (T)). We calculate the correction and derive related Ward identity for the impurity-spin-wave vertex.
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