Enhancement of the phonon density of states due to low-energy floppy modes in crystalline and glassy states of the high-temperature ceramic Si₃{N}₄$ is investigated using the molecular-dynamics method. Floppy modes appear continuously in the glass as the connectivity of the system is reduced. In the crystal, they appear suddenly at 20% volume expansion. The density of states due to the floppy modes varies linearly with energy, and the specific heat is significantly enhanced by the floppy modes.
No takes yet. Share an insight, caveat, or question.
Vashishta et al. (1995) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: