@article{discovery1421842,
            note = {Copyright {\copyright} 2014 American Physical Society.},
         journal = {Physical Review Letters},
          number = {2},
           title = {Resonant X-Ray Scattering and the Jeff=1/2 Electronic Ground State in Iridate Perovskites},
            year = {2014},
           month = {January},
          volume = {112},
          author = {Moretti Sala, M and Boseggia, S and McMorrow, DF and Monaco, G},
             url = {http://dx.doi.org/10.1103/PhysRevLett.112.026403},
        abstract = {The resonant x-ray scattering (magnetic elastic, RXMS, and inelastic, RIXS) of Ir4+ at the L2,3 edges relevant to spin-orbit Mott insulators An+1IrnO3n+1 (A=Sr, Ba, etc.) are calculated using a single-ion model which treats the spin-orbit and tetragonal crystal-field terms on an equal footing. Both RXMS and RIXS in the spin-flip channel are found to display a nontrivial dependence on the direction of the magnetic moment, {\ensuremath{\mu}}. Crucially, we show that for {\ensuremath{\mu}} in the ab plane, RXMS in the cross-polarized channel at the L2 edge is zero irrespective of the tetragonal crystal field; spin-flip RIXS, relevant to measurements of magnons, behaves reciprocally, being zero at L2 when {\ensuremath{\mu}} is perpendicular to the ab plane. Our results have important implications for the assignment of a jeff=1/2 ground state on the basis of resonant x-ray experiments.},
            issn = {0031-9007}
}