Singly occupied 4𝑓 antiferromagnetic insulators: CePO4 and CeVO4
- Univ. of Iowa, Iowa City, IA (United States)
- Univ. of Iowa, Iowa City, IA (United States); Eindhoven Univ. of Technology (Netherlands)
Rare-earth containing wide band gap oxides, which provide spin-photon interface and narrow linewidth optical emission, are getting significant attention as the most promising candidate materials in advancing quantum transduction and memories. Here, in this work, from ab initio calculations, we identify antiferromagnetic ground states in structurally preferred monoclinic CePO4 and tetragonal CeVO4 exhibiting localized occupied and unoccupied Ce 4𝑓 states with 4𝑓−4𝑓 transition characteristics. Interestingly, in CePO4, O 2𝑝 and P 3𝑝 states hybridize negligibly with Ce 4𝑓 states, while in CeVO4, V 3𝑑 and O 2𝑝 states hybridize and appear as extended states in between the occupied and unoccupied Ce 4𝑓 states. Here, phonon calculations and analysis identify and differentiate Raman active phonon modes along with the spin phonon coupling of Ce in both CePO4 and CeVO4 that ultimately lead to different 4𝑓 ground-state crystal-field multiplets, which are critical to accurately describe electronic transitions for foundational quantum transduction and memories. Further, the identified 𝐶1 site symmetry of Ce, lacking inversion symmetry in CePO4, is relevant for quantum memories and 𝐷2𝑑 site symmetry of Ce exhibiting inversion symmetry in CeVO4 is relevant for quantum transduction.
- Research Organization:
- Univ. of Iowa, Iowa City, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-76SF00515; SC0023393
- OSTI ID:
- 3011348
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 15 Vol. 112; ISSN 2469-9969; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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