2002/09/04 by Hiroyuki Ishibashi, H. Ishibashi, T. Y. Koo +7 · 52 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Annealing (glass) #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Materials science #Multiferroics and related materials #Physics #Spinel #Tetragonal crystal system #Triclinic crystal system #cond-mat
paper · pdf · doi:10.1103/physrevb.66.144424
published in Physical review. B, Condensed matter 66(14) (American Physical Society) · 5 pages, 4 embedded figures
arxiv created 2002/09/04 · openalex publication_date 2002/10/31 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
At low temperatures, spinel CuIr2S4 is a charge-ordered spin-dimerized insulator with triclinic lattice symmetry. We find that x rays induce a structural transition in which the local triclinic structure is preserved, but the average lattice symmetry becomes tetragonal. These structural changes are accompanied by a thousandfold reduction in the electrical resistivity. The transition is persistent, but the original state can be restored by thermal annealing. We argue that x-ray irradiation disorders the lattice dimerization pattern, producing a state in which the orientation of the dimers is preserved, but the translational long-range order is destroyed.