Kondo effect of non-magnetic impurities and the co-existing charge order in the cuprate superconductors

Details Kondo effect of non-magnetic impurities and the co-existing charge order in the cuprate superconductors Kondo effect of non-magnetic impurities and the co-existing charge order in the cuprate superconductors

2002-03-06

arxiv.org/abs/cond-mat/0203142v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.67.094513

We present a theory of Kondo effect caused by an induced magnetic moment near non-magnetic impurities such as Zn and Li in the cuprate superconductors. Based on the co-existence of charge order and superconductivity, a natural description of the induced moment and the resulting Kondo effect is obtained in the framework of bond-operator theory of microscopic t-J-V Hamiltonian. The local density of state near impurities is computed in a self-consistent Bogoliubov-de Gennes theory which shows a low-energy peak in the middle of superconducting gap. Our theory also suggests that the charge order can be enhanced near impuries.

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