| Issue |
Europhys. Lett.
Volume 60, Number 5, December 2002
|
|
|---|---|---|
| Page(s) | 757 - 763 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00373-4 | |
| Published online | 01 November 2002 | |
Magnetic effect from non-magnetic impurity
in superconducting 
plane
1
Bogolyubov Institute for Theoretical Physics
14b Metrologichna str., 03143 Kiev-143, Ukraine
2
CFP/Departamento de Fisica, Unversidade do Porto
Rua do Campo Alegre 687, 4169-007 Porto, Portugal
Received:
22
April
2002
Accepted:
26
September
2002
We propose a new model of impurity center formed by a cathion
substitute for 
, like 
, in
planes. Its main effect on superconducting electrons is due to the
non-zero exchange field on 
sites, neighbors to
(non-magnetic) impurity. We discuss a strong suppression of the
d-wave order parameter, a zero-energy resonance in the local
density of states, and spin polarization of charge carriers,
which can be related to the experimentally observed effects in
-doped copper oxides. These results are obtained
without using the widely accepted unitary scattering
limit.
PACS: 74.20.-z – Theories and models of superconducting state / 74.62.Dh – Effects of crystal defects, doping and substitution / 74.72.-h – High-
compounds
© EDP Sciences, 2002
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