BiNiO3 exhibits charge glass state under high pressure

Researchers have discovered that the material BiNiO3 undergoes a significant transformation when exposed to high pressure and low temperatures. This leads to a disordered "charge glass" state, disrupting its usual electrical charge arrangement. Under normal conditions, BiNiO3 maintains a specific order of bismuth ions. However, at pressures above 3 gigapascals, this structure begins to break down, resulting in random charge distribution. Further pressure increases cause a complete collapse of the ordered pattern. This finding highlights the complex interactions between pressure, temperature, and electrical properties in materials. It may open new avenues for developing advanced materials with unique characteristics, such as negative thermal expansion and improved electronic applications.