Spin Gap inthe Trellis Ladder Chain of V 4+ Ions in PbVO 2 F 2

作者：Tianyu Zhu (1525390), W B Wei, Wenhao Zhang (303192), Yuwei Huang, Pengfei Zhou (3223116), Donger Cheng, Fuxi Zhou, Guang Wang (137916), Junrong ZHANG, Yanqi Wang, Xiao Wang (19312), 贺张真, Myung-Hwan Whangbo (1358673), Hyun‐Joo Koo, Erxi Feng · 发表于：Figshare · 年份：2026 · DOI：10.1021/acs.inorgchem.6c01167.s001 · 研究领域：Inorganic Fluorides and Related Compounds、Advanced Condensed Matter Physics、Physics of Superconductivity and Magnetism

A novel lead vanadate oxyfluoride, PbVO 2 F 2 , has been successfully synthesized via the hydrothermal method. The compound PbVO 2 F 2 features a simple one-dimensional trellis ladder architecture built from V 4+ ions, with adjacent VO 4 F 2 octahedra connected through edge- and corner-sharing oxygen atoms. Magnetic measurements show that PbVO 2 F 2 possesses a spin-singlet ground state with a spin gap of ∼40 K. Our analysis of the spin exchanges in PVO 2 F 2 reveals that each trellis ladder chain of V 4+ ions forms a uniform antiferromagnetic (AFM) chain made up of ferromagnetic (FM) dimers and undergoes a short-range order (SRO) fluctuation and that the observed spin gap is related to the local excitation energy needed for an FM spin dimer to spin flip in the AFM clusters generated in each AFM trellis ladder chain due to the SRO fluctuation.