Superexchange,

reportActive / Technical Report | Accession Number: AD0736878 | Need Help?

Abstract:

The theory of superexchange couplings in ionic solids is reviewed using a configuration-interaction approach. A discussion is given of the origin of the Kanamori-Goodenough KG rules taking into account lack of orthogonalization between atomic orbitals. It is shown that this effect can reverse the sign expected from the KG rules. Contact is made with the theory of Anderson, and his potential and kinetic exchange contributions are identified within the configuration interaction picture. The systematics of superexchange interactions are investigated for d3 ions in the chalcogenides, and recent experimental work is cited in support of predictions. Author

Author(s):
Orbach, R. ; Huang, Nai Li
Author Organization(s):
CALIFORNIA UNIV LOS ANGELES DEPT OF PHYSICS
Pagination:
0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-69-A-0200-4032, NSF-GP-21290
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*SOLID STATE PHYSICS, ATOMIC ORBITALS), ANTIFERROMAGNETISM, FERROMAGNETISM, CHEMICAL BONDS, EXCITATION, INTERACTIONS, MAGNESIUM OXIDES, VANADIUM
Field(s)/Group(s):
Solid State Physics
Keyword(s):
LIGAND FIELDS, *SUPEREXCHANGE INTERACTIONS, ELECTRON SPIN, EXCHANGE INTERACTIONS
Report Date:
1970 Jan 01