High-temperature ferrimagnetic order triggered metal-to-insulator transition in CaCu₃Ni₂Os₂O₁₂
A spin-driven Lifshitz transition in CaCu₃Ni₂Os₂O₁₂ leads to a rare high-temperature ferrimagnetic semiconductor. This dual spin–charge transition enables metal–insulator switching above 393 K, beyond conventional Mott or Slater mechanisms.
