Excitons in Magnetic Insulators with Reference to the Hubbard Model
- 1 February 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 5 (3) , 1180-1182
- https://doi.org/10.1103/physrevb.5.1180
Abstract
The Hubbard model with two orbitals per atom in its insulating limit is shown to be equivalent to a special case of the generalized spin Hamiltonian including two orbital states, which has been put forth previously. In the light of this equivalence, it is pointed out that the recent theory of exciton line broadening in Mott-Hubbard insulators by Doniach, Roulet, and Fisher corresponds to a rather unrealistic limit of large spin-dependent excitation transfer.Keywords
This publication has 7 references indexed in Scilit:
- Excitons in Mott-Hubbard InsulatorsPhysical Review Letters, 1971
- Magnons, Excitons and Light Scattering in Antiferromagnetic CoF2Journal of the Physics Society Japan, 1971
- Raman Light Scattering from Excitons and Magnons in Cobalt FluoridePhysical Review Letters, 1970
- Effects of Spin Waves on Spin-Allowed Optical TransitionsJournal of the Physics Society Japan, 1968
- Magnetic Effects in the Near Infrared Spectrum of FePhysical Review B, 1968
- Optical Spectrum of CoPhysical Review B, 1968
- New Approach to the Theory of Superexchange InteractionsPhysical Review B, 1959