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dc.contributor.authorGellé, Alaincat
dc.contributor.authorMunzarová, Markéta
dc.contributor.authorLepetit, Marie-Bernadettecat
dc.contributor.authorIllas i Riera, Francesccat
dc.description.abstractThe role of the bridging ligand on the effective Heisenberg coupling parameters is analyzed in detail. This analysis strongly suggests that the ligand-to-metal charge transfer excitations are responsible for a large part of the final value of the magnetic coupling constant. This permits us to suggest a variant of the difference dedicated configuration interaction (DDCI) method, presently one of the most accurate and reliable for the evaluation of magnetic effective interactions. This method treats the bridging ligand orbitals mediating the interaction at the same level than the magnetic orbitals and preserves the high quality of the DDCI results while being much less computationally demanding. The numerical accuracy of the new approach is illustrated on various systems with one or two magnetic electrons per magnetic center. The fact that accurate results can be obtained using a rather reduced configuration interaction space opens the possibility to study more complex systems with many magnetic centers and/or many electrons per center.eng
dc.publisherThe American Physical Societyeng
dc.relation.isformatofReproducció digital del document publicat en format paper, proporcionada per PROLA i
dc.relation.ispartofPhysical Review B, 2003, vol. 68, núm. 12, p. 125103-1-125103-7eng
dc.rights(c) The American Physical Society, 2003eng
dc.sourceArticles publicats en revistes (Ciència dels Materials i Química Física)-
dc.subject.classificationEstructura electrònicacat
dc.subject.otherElectronic structureeng
dc.titleThe role of dynamical polarization of the ligand-to-metal charge transfer excitations in the ab initio determination of effective exchange parameterseng
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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