Data · dataset · 2026
Phonons reflect dynamic spin-state order in LaCoO$_3$
Listed in RADAR and RADAR4Memory — shown once because both records carry DOI 10.35097/xayn6n5pmcvdk776
Description
We investigate lattice dynamics in LaCoO₃ using inelastic neutron and x-ray scattering over T = 2–650 K, spanning the spin-state crossover at T₁ ≈ 100 K and the insulator–metal transition at T₂ ≈ 550 K. Comparison with quasi-harmonic ab-initio lattice-dynamical calculations helps reveal anomalous softening of a ≈10-meV oxygen phonon, confined to the temperature interval T₁ ≤ T ≤ T₂ and localized in momentum space at qSSO = (½,½,½)c.
This wave vector corresponds to the spin-state ordering originally proposed by Goodenough [J. Phys. Chem. Solids 6, 287-297 (1958)].
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Our results therefore provide momentum-resolved evidence for dynamic correlations of high-spin and low-spin Co³⁺ states in LaCoO₃, linking spin-state fluctuations to anomalous phonon renormalization.
Links
Where it is published
- DOI doi.org/10.35097/xayn6n5pmcvdk776 ↗
DOI / persistent id · from radar service eu de
Catalogue records · 1
- OAI-PMH record radar-service.eu/oai/OAIHandler?verb=GetRecord&metadataPrefix=oai_dc&identifier… ↗
metadata API · from radar service eu de
Topics
- From keywords
- Earth & Environmental Science · Earth & Environmental Science · Physics · Physics
- Inferred from text
- Condensed matter modelling and density functional theory 76%
Provenance · 2 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| RADAR | 10.35097/xayn6n5pmcvdk776 | 12 d ago | JSON v1 |
| RADAR4Memory | 10.35097/xayn6n5pmcvdk776 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| concepts[field].anzsrc:field:510403 | enrichment · radar service eu de | taxonomy-embedding@1.1.0 | title+keywords+description (76%) |
| concepts[field].local:field:earth-environmental | mapping · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · radar4memory radar service eu | connector:radar4memory_radar_service_eu@1.0.0 | |
| concepts[field].local:field:physics | mapping · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| concepts[field].local:field:physics | mapping · radar4memory radar service eu | connector:radar4memory_radar_service_eu@1.0.0 | |
| description | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | /metadata/dc/description |
| license | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | /metadata/dc/rights |
| publication_date | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| title | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | /metadata/dc/title |