Details
| Original language | English |
|---|---|
| Article number | 095002 |
| Journal | Physical Review Materials |
| Volume | 8 |
| Issue number | 9 |
| Publication status | Published - 20 Sept 2024 |
| Externally published | Yes |
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.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
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In: Physical Review Materials, Vol. 8, No. 9, 095002, 20.09.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Charge-ordering and spin-dimerization transition in CuIr2 S4
T2 - Lattice dynamics confirms octamer correlations
AU - Gnezdilov, V.
AU - Glamazda, A.
AU - Tsurkan, V.
AU - Lemmens, P.
N1 - Publisher Copyright: © 2024 American Physical Society.
PY - 2024/9/20
Y1 - 2024/9/20
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85204761733&partnerID=8YFLogxK
U2 - 10.1103/physrevmaterials.8.095002
DO - 10.1103/physrevmaterials.8.095002
M3 - Article
AN - SCOPUS:85204761733
VL - 8
JO - Physical Review Materials
JF - Physical Review Materials
IS - 9
M1 - 095002
ER -