%0 Journal Article
%A Boseggia, S
%A Springell, R
%A Walker, HC
%A Ronnow, HM
%A Rueegg, C
%A Okabe, H
%A Isobe, M
%A Perry, RS
%A Collins, SP
%A McMorrow, DF
%D 2013
%F discovery:10134049
%I AMER PHYSICAL SOC
%J Physical Review Letters
%N 11
%T Robustness of Basal-Plane Antiferromagnetic Order and the J(eff)=1/2 State in Single-Layer Iridate Spin-Orbit Mott Insulators
%U https://discovery.ucl.ac.uk/id/eprint/10134049/
%V 110
%X The magnetic structure and electronic ground state of the layered perovskite   Ba  2  IrO  4   have been investigated using x-ray resonant magnetic scattering. Our results are compared with those for   Sr  2  IrO  4  , 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   Ba  2  IrO  4  , 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   5  d   transition metal oxides.
%Z This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.