DOAJ Open Access 2025

Orbital inversion and emergent lattice dynamics in infinite layer CaCoO 2

Daniel Jost Eder G. Lomeli Woo Jin Kim Emily M. Been Matteo Rossi +8 lainnya

Abstrak

Abstract The layered cobaltate CaCoO 2 exhibits a unique herringbone-like structure. Serving as a potential prototype for a new class of complex lattice patterns, we study the properties of CaCoO 2 using X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). Our results reveal a significant inter-plane hybridization between the Ca 4s- and Co 3d- orbitals, leading to an inversion of the textbook orbital occupation of a square planar geometry. Further, our RIXS data reveal a strong low energy mode, with anomalous intensity modulations as a function of momentum transfer close to a quasi-static response. These findings indicate that the newly discovered herringbone structure exhibited in CaCoO 2 may serve as a promising laboratory for the design of materials having strong electronic, orbital and lattice correlations.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (13)

Daniel Jost

Eder G. Lomeli

Woo Jin Kim

Emily M. Been

Matteo Rossi

Stefano Agrestini

Ke-Jin Zhou

Chunjing Jia

Brian Moritz

Zhi-Xun Shen

Harold Y. Hwang

Thomas P. Devereaux

Wei-Sheng Lee

Format Sitasi

APA MLA BibTeX

Jost, D., Lomeli, E.G., Kim, W.J., Been, E.M., Rossi, M., Agrestini, S. et al. (2025). Orbital inversion and emergent lattice dynamics in infinite layer CaCoO 2. https://doi.org/10.1038/s41535-025-00778-z

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.1038/s41535-025-00778-z
Akses: Open Access ✓