Phonons are sound particles or quantized vibrations of atoms in solid materials. The Debye model, a theory introduced by physicist Peter Debye in 1912, describes the contribution of phonons to the ...

Introduction Have you ever heard the expression, "solid as a rock"? As it turns out, rocks are not entirely solid. Rocks actually have tiny pockets of air inside them. This is obvious when you look at ...

In A Nutshell Scientists discovered a previously unknown form of mixing that occurs when large groups of dense particles ...

When we take a look at some of the greatest unsolved problems in theoretical physics today, there's something many of them have in common. According to the known particles and interactions, there ...