Ionic Ordering in Thiospinel CuIr$_{2}$S$_{4}$

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dc.creatorFurubayashi, T.
dc.creatorMatsumoto, T.
dc.creatorNagata, S.
dc.date2002-03-21
dc.date.accessioned2026-07-07T02:44:45Z
dc.date.available2026-07-07T02:44:45Z
dc.descriptionCrystal structure of spinel compound CuIr$_{2}$S$_{4}$ was examined by powder X-ray diffraction for the insulating phase below the metal-insulator transition at $T_{MI}$ = 230 K. The superstructure spots are reproduced by considering the displacement of Ir atoms. A model for the ionic ordering of Ir$^{4+}$ and Ir$^{3+}$ with the same number is proposed for the insulating phase on the basis of the structural analysis. The model suggests that the structural change at $T_{MI}$ is driven by the formation Ir$^{4+}$ dimers. In addition, we found that the superstructure spots becomes significantly weak below 60 K, without any significant effects on electric and magnetic properties. Possible mechanism for the transition is discussed.
dc.description10 pages, 4 figures, submitted to J. Phys. Soc. Japan
dc.identifierhttps://arxiv.org/abs/cond-mat/0203427
dc.identifierhttp://arxiv.org/abs/cond-mat/0203427
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19056
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleIonic Ordering in Thiospinel CuIr$_{2}$S$_{4}$
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