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𝐴-site-ordered perovskites (𝐴𝐴’3𝐵4O12) provide a structurally robust platform for exploring correlated-electron behavior, offering unusual opportunities to disentangle the roles of orbital degrees of freedom, bonding interactions, and local structural distortions. In this work, we synthesize a new 𝐴-site-ordered perovskite PbCu3V4O12 under high-pressure and high-temperature conditions and perform comprehensive structural and physical characterizations. PbCu3V4O12 crystallizes in the cubic 𝐼𝑚-3 structure, yet its structural parameters deviate markedly from the established ionic-radius trend in the 𝐴Cu3V4O12 (𝐴=Mn, Cu, Ca) series. This deviation reveals local structural modifications driven by the Pb2+ lone-pair electrons. The compound exhibits metallic behavior down to at least 8 K and shows a moderately enhanced Sommerfeld coefficient, with density-functional calculations confirming the associated mass enhancement. Comparison of the experimental and theoretical magnetic susceptibilities further indicates an additional contribution from the Stoner mechanism. These results identify PbCu3V4O12 as a rare example of a 3𝑑-electron metallic vanadate with moderate electronic correlations, demonstrating how 𝐴-site chemistry and lone-pair-induced local distortions can be used to engineer correlated electronic states in perovskite-related materials.

権利情報:

• In Copyright
  

  ©2026 American Physical Society

キーワード: A-site-ordered perovskites, quadruple perovskites, high-pressure synthesis, crystal structures

刊行年月日: 2026-05-26

出版者: American Physical Society (APS)

掲載誌:

• Physical Review Materials (ISSN: 24759953) vol. 10 issue. 5 055003

研究助成金:

• National Key Research and Development Program of China 2023YFA1406002
• National Key Research and Development Program of China 2020YFA0308801
• National Natural Science Foundation of China 12174025
• National Natural Science Foundation of China 12321004
• National Natural Science Foundation of China 12204045
• National Natural Science Foundation of China 12574141
• National Natural Science Foundation of China 12234016
• National Natural Science Foundation of China 12074031
• Chinese Academy of Sciences SCZX-0101
• Beijing Institute of Technology Research Fund Program for Young Scholars 2023CX01027
• Beijing Institute of Technology
• Japan Synchrotron Radiation Research Institute 2024B1825

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6453

公開URL: https://doi.org/10.1103/kf19-sqzc

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更新時刻: 2026-08-17 14:49:36 +0900

MDRでの公開時刻: 2026-08-17 16:29:49 +0900