Absence of collective effects in Heisenberg systems with localized magnetic moments
| Data(s) |
22/01/2010
22/01/2010
1997
|
|---|---|
| Resumo |
Existence of collective effects in magnetic coupling in ionic solids is studied by mapping spin eigenstates of the Heisenberg and exact nonrelativistic Hamiltonians on cluster models representing KNiF3, K2NiF4, NiO, and La2CuO4. Ab initio techniques are used to estimate the Heisenberg constant J. For clusters with two magnetic centers, the values obtained are about the same for models having more magnetic centers. The absence of collective effects in J strongly suggests that magnetic interactions in this kind of ionic solids are genuinely local and entangle only the two magnetic centers involved. |
| Formato |
4 p. application/pdf |
| Identificador |
0163-1829 http://hdl.handle.net/2445/10839 125945 |
| Idioma(s) |
eng |
| Publicador |
The American Physical Society |
| Relação |
Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.56.5069 Physical Review B, 1997, vol. 56, núm. 9, p. 5069-5072. |
| Direitos |
(c) The American Physical Society, 1997 info:eu-repo/semantics/openAccess |
| Palavras-Chave | #Superconductivitat #Materials #Estructura electrònica #Superconductivity #Materials #Electronic structure |
| Tipo |
info:eu-repo/semantics/article |
