期刊
PHYSICAL REVIEW B
卷 80, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.014408
关键词
ab initio calculations; antiferromagnetic materials; exchange interactions (electron); Heisenberg model; KKR calculations; lattice constants; manganese compounds; Neel temperature; spin waves; strongly correlated electron systems
资金
- Deutsche Forschungsgesellschaft (DFG) [SFB 762]
- U.S. Department of Energy [DE-AC05-00OR22725]
An ab initio study of magnetic-exchange interactions in antiferromagnetic and strongly correlated 3d transition metal monoxides is presented. Their electronic structure is calculated using the local self-interaction correction approach, implemented within the Korringa-Kohn-Rostoker band-structure method, which is based on multiple scattering theory. The Heisenberg exchange constants are evaluated with the magnetic force theorem. Based on these the corresponding Neacuteel temperatures T-N and spin-wave dispersions are calculated. The Neacuteel temperatures are obtained using mean-field approximation, random-phase approximation and Monte Carlo simulations. The pressure dependence of T-N is investigated using exchange constants calculated for different lattice constants. All the calculated results are compared to experimental data.
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