"With the Frontera supercomputer, we were able to make a navigation map of the elastic strain space which governs diamond's phonon stability and thermal conductivity for the first time," Li added.

The phonon-glass requirement stems from the need for as low a lattice thermal conductivity as possible. Traditional thermoelectric materials have used site substitution (alloying) with ...

(b) An example of phonon band structure. The orange area marks the forbidden ... phononic crystals can be designed to have high thermal conductivity in specific directions while suppressing heat ...

This SiO₂ coating acts as a phonon barrier ... Ultralow cross-plane thermal conductivity is as low as 0.018 W/m·K, and an ...