6533b7d6fe1ef96bd1266eba
RESEARCH PRODUCT
Anisotropic double exchange in orbitally degenerate mixed valence systems
Juan J. Borrás-almenarEugenio CoronadoBoris TsukerblatBoris TsukerblatA. V. PaliiA. V. PaliiJuan M. Clemente-juanJuan M. Clemente-juansubject
Magnetic anisotropyValence (chemistry)Condensed matter physicsChemistryMetal ions in aqueous solutionDegenerate energy levelsGeneral Physics and AstronomyPhysical and Theoretical ChemistryAnisotropyQuantum numberTransition metal ionsdescription
Abstract The problem of the double exchange is considered for the mixed valence dimers in which one or both transition metal ions possess orbitally degenerate ground states. In the pseudo-angular momentum representation, the general formula is deduced for the matrix elements of double exchange involving the transfer integrals and all spin and orbital quantum numbers. The pairs 3 T 1 t 2 2 – 2 T 2 t 2 1 and 3 T 1 t 2 2 – 4 A 2 t 2 3 are considered in three high-symmetric topologies: edge-shared D2h, corner-shared D4h, and face-shared D3h bioctahedra. The double exchange in orbitally degenerate systems is shown to produce strong magnetic anisotropy of an orbital nature. The character of the anisotropy proved to be dependent on the overall symmetry of the system and on the ground terms of the metal ions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-04-01 | Chemical Physics |