Charge-ordering and spin-dimerization transition in CuIr2 S4
Lattice dynamics confirms octamer correlations
- verfasst von
- V. Gnezdilov, A. Glamazda, V. Tsurkan, P. Lemmens
- Abstract
In the spinel CuIr2S4 an exotic, orbitally driven metal-insulator (MI) transition is observed at TMI∼230K. However, spectroscopic investigations presently do not agree with respect to the role of related lattice distortions and dynamic effects. Here, we present a detailed study of single-crystalline CuIr2S4 from different batches comparing detailed high- and low-temperature phonon spectra. An analysis using dynamic lattice calculations confirms a low-temperature collectively distorted structure according to previous synchrotron x-ray studies. The related isomorphic Ir3+ and Ir4+ octamers' formation and spin dimerization agree well with the proposed P1¯ symmetry. Thereby, previous discrepancies are resolved.
- Externe Organisation(en)
-
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine
Technische Universität Braunschweig
Kharkov National University
Universität Augsburg
Moldova State University
- Typ
- Artikel
- Journal
- Physical Review Materials
- Band
- 8
- Publikationsdatum
- 20.09.2024
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Allgemeine Materialwissenschaften, Physik und Astronomie (sonstige)
- Elektronische Version(en)
-
https://doi.org/10.1103/physrevmaterials.8.095002 (Zugang:
Geschlossen)