Occupational Disorder as the Origin of Flattening of the Acoustic Phonon Branches in the Clathrate Ba${}_8$Ga${}_{16}$Ge${}_{30}$

Susmita Roy, Tyler C. Sterling, Daniel Parshall +4

In the search for high-performance thermoelectrics, materials such as clathrates have drawn attention due to having both glass-like low phonon thermal conductivity and crystal-like…