Robustness of Basal-Plane Antiferromagnetic Order and the J(eff)=1/2 State in Single-Layer Iridate Spin-Orbit Mott Insulators

S. Boseggia*, R. Springell, H. C. Walker, H. M. Ronnow, Ch. Rueegg, H. Okabe, M. Isobe, R. S. Perry, S. P. Collins, D. F. McMorrow

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

98 Citations (Scopus)


The magnetic structure and electronic ground state of the layered perovskite Ba2IrO4 have been investigated using x-ray resonant magnetic scattering. Our results are compared with those for Sr2IrO4, for which we provide supplementary data on its magnetic structure. We find that the dominant, long-range antiferromagnetic order is remarkably similar in the two compounds and that the electronic ground state in Ba2IrO4, deduced from an investigation of the x-ray resonant magnetic scattering L-3/L-2 intensity ratio, is consistent with a J(eff) = 1/2 description. The robustness of these two key electronic properties to the considerable structural differences between the Ba and Sr analogues is discussed in terms of the enhanced role of the spin-orbit interaction in 5d transition metal oxides. DOI: 10.1103/PhysRevLett.110.117207

Original languageEnglish
Article number117207
Number of pages5
JournalPhysical Review Letters
Issue number11
Publication statusPublished - 13 Mar 2013


  • SR2IRO4

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