Anisotropic softening of magnetic excitations in lightly electron doped Sr${}_2$IrO${}_4$

Xuerong Liu, M. P. M. Dean, Z. Y. Meng +9

The magnetic excitations in electron doped (Sr${}_{1-x}$La${}_x$)${}_2$IrO${}_4$ with $x=0.03$ were measured using resonant inelastic X-ray scattering at the Ir $L_3$-edge. Although much…