| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
|
|
|---|---|---|
| Page(s) | C8-2151 - C8-2152 | |
| DOI | https://doi.org/10.1051/jphyscol:19888963 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2151-C8-2152
DOI: 10.1051/jphyscol:19888963
Dph. G. SPSRM- CEA CENS, 91191 Gif sur Yvette Cedex, France
J. Phys. Colloques 49 (1988) C8-2151-C8-2152
DOI: 10.1051/jphyscol:19888963
FOUR SPIN EXCHANGE IN HIGH Tc SUPERCONDUCTORS
M. Roger et J. M. DelrieuDph. G. SPSRM- CEA CENS, 91191 Gif sur Yvette Cedex, France
Abstract
Taking into account the small energy difference of conducting holes between Cu and O sites and large on-site energy for double occupancy which prevents holes from crossing on the same site, we prove that cyclic four hole exchange via intermediate O sites is dominant in the 2D CuO2 square lattice, like in hard core solid 3He. Some experimental discrepancies are resolved by this model.