| Numéro |
J. Phys. I France
Volume 6, Numéro 12, December 1996
|
|
|---|---|---|
| Page(s) | 2291 - 2297 | |
| DOI | https://doi.org/10.1051/jp1:1996218 | |
DOI: 10.1051/jp1:1996218
J. Phys. I France 6 (1996) 2291-2297The EFG Analysis of La
Ivan Kupcic1, Slaven Barisic1 and Eduard Tutis2
1 Department of Physics, POB 162, Faculty of Sciences, Zagreb, Croatia
2 Institute of Physics of the University, POB 304, Zagreb, Croatia
(Received 30 August 1996, accepted 3 September 1996)
© Les Editions de Physique 1996
J. Phys. I France 6 (1996) 2291-2297
The EFG Analysis of La
CuO
and YBa
Cu
O
Based
Superconductors
Ivan Kupcic1, Slaven Barisic1 and Eduard Tutis2
1 Department of Physics, POB 162, Faculty of Sciences, Zagreb, Croatia
2 Institute of Physics of the University, POB 304, Zagreb, Croatia
(Received 30 August 1996, accepted 3 September 1996)
Abstract
It is shown that the 3d
3z2-r2 orbital of the in-plane copper and the 2p
z apex oxygen orbital are absent at the Fermi level of La
2-xSr
xCuO
4, at variance with proposals giving importance to copper-apex oxygen hybridization. At the in-plane oxygen site a sizable
2p
z admixture is found at the Fermi level of YBa
2Cu
3O
7. The additional holes are shared among copper and oxygen sites in similar proportions. This is shown compatible with the
large
Emery model provided that the difference between the p and d atomic energies is comparable to the first neighbor overlap
energy.
© Les Editions de Physique 1996