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

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2013
Author Boseggia S., Springell R., Walker H. C., Ronnow H. M., Rueegg Ch., Okabe H., Isobe M., Perry R. S., Collins S. P., McMorrow D. F.,
Project Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials
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Original article (peer-reviewed)

Journal PHYSICAL REVIEW LETTERS
Volume (Issue) 110(11)
Page(s) 117207
Title of proceedings PHYSICAL REVIEW LETTERS
DOI 10.1103/PhysRevLett.110.117207

Open Access

URL https://infoscience.epfl.ch/record/206255?ln=en
Type of Open Access Repository (Green Open Access)

Abstract

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 L3/L2 intensity ratio, is consistent with a Jeff=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.
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