X-ray-induced disordering of the dimerization pattern and apparent low-temperature enhancement of lattice symmetry in spinel CuIr${}_2$S${}_4$

H. Ishibashi, T. Y. Koo, Y. S. Hor +5

At low temperatures, spinel CuIr${}_2$S${}_4$ is a charge-ordered spin-dimerized insulator with triclinic lattice symmetry. We find that x-rays induce a structural transition in which…