AI Insight
Scientists at the Chinese Academy of Sciences have discovered that the layered superionic conductor AgCrSe₂ exhibits three distinct types of atomic vibrations (phonons) simultaneously within a single crystalline material. The material displays liquid-like, glass-like, and crystal-like phonon behaviors coexisting at the same time, which challenges conventional understanding of how atomic vibrations typically manifest in solid materials. This observation was made through direct experimental measurements of the phonon dynamics in this layered compound.
Why it matters
This discovery could advance the development of superior thermoelectric materials and ionic conductors, as understanding and controlling multiple phonon behaviors simultaneously may enable materials with ultra-low thermal conductivity while maintaining high electrical conductivity. Such properties are essential for more efficient energy conversion devices and next-generation batteries.
Understand the Science
Scientists from the Institute of Metal Research (IMR) of the Chinese Academy of Sciences have directly observed liquid-like, glass-like and crystal-like phonon behaviors coexisting in a crystalline solid—the layered superionic conductor AgCrSe₂.
Source: Layered superionic conductor hosts atomic vibrations that behave like liquids, glasses and crystals