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- W2899347962 abstract "Abstract A systematic study, using first-principles methods, is performed to understand the nature and origin of electronic gap and magnetism in the double perovskite antiferromagnetic insulator Ba2CaIrO6. By virtue of its perfectly aligned IrO6, motifs the system may be anticipated as an ideal spin-orbit driven J eff system. However, different from the Ir + 4 and Ir + 5 iridates, our calculations reveal that the electronic gap in Ba2CaIrO6 is implicitly associated with an unconventional antiferromagnetic ordering of Ir spins, thereby classifying this Ir + 6 iridate as a Slater-type antiferromagnetic insulator. On the other hand, spin-orbit coupling enhances the Ir 5 d - O 2 p orbital hybridization, due to which both the magnitude of the electronic gap and the local Ir magnetic moment decreases in comparison to the scalar relativistic calculations. Our results not only affirm the validity of local approximations to the exchange-correlation potential in the scalar relativistic Kohn-Sham Hamiltonian, but also strongly convey that the insulating nature of iridates may be intimately linked with magnetism." @default.
- W2899347962 created "2018-11-09" @default.
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- W2899347962 date "2019-04-01" @default.
- W2899347962 modified "2023-09-23" @default.
- W2899347962 title "Double perovskite Ba2CaIrO6: A Slater-type antiferromagnet system" @default.
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- W2899347962 doi "https://doi.org/10.1016/j.jmmm.2018.10.139" @default.
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