Sentences with phrase «phonon mode»

«What we found is that this particular phonon mode is the one that's unstable, that «freezes,»» Delaire said.

Pure quartic phonon modes in scandium flouride stiffen at elevated temperature and large side motions of the flourine atoms pulls their neighbouring scandium atoms together.

Not exact matches

Henry's successes in capturing the atomic vibrations of glass was due to the development of a new way of studying the dynamics of phonons, which he'd created with with Wei Lv, a doctoral student in his lab, Known as Green - Kubo Modal Analysis (GKMA), the new method uses molecular dynamics simulations to more accurately calculate the contributions different modes of vibration make to the heat conduction.

Systematic analysis is performed based on the study of the contribution from phonon branches, comparison among the mode level phonon group velocity and lifetime, the detailed process and channels of phonon — phonon scattering, and phonon anharmonicity with potential energy well.

We find that the divergence of the thermal expansion coefficients near the phase transition in GeTe is induced by acoustic phonon coupling to soft TO modes.