Band Theory of Superexchange Interaction
Open Access
- 1 November 1957
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 18 (5) , 541-551
- https://doi.org/10.1143/ptp.18.541
Abstract
A spin dependent energy of NiO crystal is given. One-electron orbits of the Bloch type were used as linear combinations of 2p- and 3d-orbits of O−− and Ni++ ions. For the antiferromagnetic state the ordered antiparallel spin arrangement was assumed and then two alternant bands corresponding to α and β spin Ni++ ions are mixed. Energy difference between parallel and antiparallel spin state is formulated. Rough numerical estimation, using s-ordits instead of 3d-orbits, shows that the mixing of two alternant bands plays an important role in the superexchange interaction.Keywords
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