Fig. 1: Crystal structure and magnetic configuration of undoped Sr2IrO4.
From: Interplay of canted antiferromagnetism and nematic order in Mott insulating Sr2Ir1-xRhxO4
a The crystal structure of Sr2IrO4, which belongs to the tetragonal I41/acd space group, is composed of canted IrO6 octahedra22,53. The unit cell consists of four iridium-oxide layers. b (Top view) Ground state configurations in the AFM-â… phase. c Potential magnetic configurations in the AFM-â…¡ phase for H > HC where HC is the critical field. The thin red arrow indicates the pseudospin at each Ir site, the thick black arrow indicates the net moment of each layer, and the thick blue arrow indicates the net magnetization M in a unit cell. d Schematic of the MOKE measurement. θK,L (θK,T) represents the longitudinal (transverse) Kerr angle, corresponding to the magnetization component parallel (perpendicular) to the external magnetic field H.
