Single-Electron Bond in Ir-Ir Dimer Stabilized under Pressure.

ABSTRACT: Odd-electron bonds, often considered ephemerally stable in chemical systems, can give rise to exotic physical phenomena in quantum materials. In this study, we present the design and discovery of a new iridate, Ba₃NbIr₂O₉, which hosts a single-electron bond within an Ir-Ir dimer. Ba₃NbIr₂O₉ was synthesized under high-pressure and high-temperature conditions and crystallizes in a hexagonal structure (space group P6₃/mmc). The Ir-Ir (III, IV) dimer contains an unpaired electron, leading to an electronically unstable state with potentially frustrated magnetic interactions. Magnetic susceptibility measurements reveal a paramagnetic ground state with no long-range magnetic order down to 1.8 K, despite a C

SUBMITTER: Peng C 

PROVIDER: S-EPMC12648646 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature