Kondo effect in an Antiferromagnetic metal
Strongly Correlated Electrons
2008-06-05 v2
Abstract
We study the fate of a spin-1/2 impurity in the itinerant antiferromagnetic metallic phase via a renormalization group analysis and a variational calculation. The local moment - conduction electron interaction hamiltonian in an antiferromagnetic metal is spin non-conserving. We show that for a general location of the impurity, the Kondo singularities still occur, but the ground state has a partially unscreened moment. We calculate the magnitude of this residual moment and the variation of the spin polarization with energy for a substitutional impurity as a function of the staggered magnetization. The usual Kondo effect only occurs if the impurity is placed at points where the magnetization is zero.
Cite
@article{arxiv.0708.1950,
title = {Kondo effect in an Antiferromagnetic metal},
author = {Vivek Aji and Chandra Varma and Ilya Vekhter},
journal= {arXiv preprint arXiv:0708.1950},
year = {2008}
}