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Magnetic effect from non-magnetic impurity in superconducting CuO_{2} plane

V. M. Loktev·Yu. G. Pogorelov
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Abstract

We propose a new model for impurity center formed by a cathion substitute for Cu, like Zn, in CuO_{2} planes. Its main effect on superconducting electrons is due to the non-zero exchange field on O sites, neighbors to the (non-magnetic) impurity. We discuss a strong suppression of d-wave order parameter, a zero- energy resonance in local density of states, and spin polarization of charge carriers, which can be related to the experimentally observed effects in Zn-doped copper oxides. These results are obtained \emph{without} using the unitary scattering limit.

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V. M. Loktev, Yu. G. Pogorelov. 2002-04-21. Magnetic effect from non-magnetic impurity in superconducting CuO_{2} plane. https://doi.org/10.1209/epl%2Fi2002-00373-4

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