Averievite: A copper oxide kagome antiferromagnet

Journal Article · 20 August 2018 · Physical Review B

DOI: https://doi.org/10.1103/PhysRevB.98.054421 · OSTI ID:1506419

Botana, Antia Sanchez ^[1]; Zheng, H. ^[1]; Lapidus, S. H. ^[1]; Mitchell, J. F. ^[1]; Norman, M. R. ^[1]

---

1. Argonne National Lab. (ANL) Lemont, IL (United States)

Averievite, Cu₅V₂O₁₀(CsCl), is an oxide mineral composed of Cu²⁺ kagome layers sandwiched by Cu²⁺-V⁵⁺ honeycomb layers. We have synthesized this oxide and investigated its properties from ab initio calculations along with susceptibility and specific heat measurements. The data imply a Curie-Weiss temperature of 185K as well as long-range magnetic order at 24 K due to the significant interlayer coupling from the honeycomb copper ions. This order is suppressed by substituting copper by isoelectronic zinc, suggesting that Zn-substituted averievite is a promising spin liquid candidate. A further proposed substitution that replaces V⁵⁺ by Ti⁴⁺ not only dopes the material but is predicted to give rise to a two-dimensional electronic structure featuring Dirac crossings. Thus, averievite is an attractive platform for S =1/2 kagome physics with the potential for realizing novel electronic states.

• Research Organization: Argonne National Lab. (ANL) Lemont, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1506419
• Journal Information: Physical Review B, Journal Name: Physical Review B Journal Issue: 5 Vol. 98; ISSN 2469-9950; ISSN PRBMDO
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English