Pressure-induced charge amorphisation in BiNiO₃.

ABSTRACT: The order or disorder of electrons is fundamental to materials properties and also provides simple analogues to the different states of matter. A charge ordered (CO) insulating state, analogous to a crystalline solid, is observed in many mixed valence materials. On heating, this melts to a charge liquid (metallic) phase, often with interesting associated physics and functions such as the Verwey transition of Fe₃O₄, colossal magnetoresistances in manganites (e.g., La_0.5Ca_0.5MnO₃), and superconductivity in K-doped BaBiO₃. Here we report the observation of pressure induced charge amorphisation in a crystalline material. BiNiO₃ has charge distribution Bi³⁺_0.5Bi⁵⁺_0.5Ni²⁺

SUBMITTER: Chen WT 

PROVIDER: S-EPMC11882806 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature