Towards cubic symmetry for Ir4+ : Structure and magnetism of the antifluorite K2IrBr6

@article{Khan2021TowardsCS,
  title={Towards cubic symmetry for 
Ir4+
: Structure and magnetism of the antifluorite 
K2IrBr6},
  author={N. Khan and D. A. Prishchenko and Mary H. Upton and Vladimir G. Mazurenko and Alexander A. Tsirlin},
  journal={Physical Review B},
  year={2021},
  volume={103},
  pages={125158}
}
Crystal structure, electronic state of ${\mathrm{Ir}}^{4+}$, and magnetic properties of the antifluorite compound ${\mathrm{K}}_{2}{\mathrm{IrBr}}_{6}$ are studied using high-resolution synchrotron x-ray diffraction, resonant inelastic x-ray scattering (RIXS), thermodynamic and transport measurements, and ab initio calculations. The crystal symmetry is reduced from cubic at room temperature to tetragonal below 170 K and eventually to monoclinic below 122 K. These changes are tracked by the… 
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