Then, the possible phonon modes contributing to heat conduction are both LA and TA phonons at low and high frequencies.

Each phonon mode can be split into one longitudinal and two transverse polarization branches.

Despite its 2-D nature, graphene has 3 acoustic phonon modes.

Coherence then corresponds to a decrease in the occupation numbers of phonon modes and a decreased rate of inelastic scattering.

Other work indicates that the mobility of localized electrons is enhanced by the presence of dynamic phonon modes.

The vibrational modes are restricted to part of the substrate and are thus not fully delocalized, unlike phonon vibrational modes.

A mathematical analysis, leads to an equation for the average number of electron-hole pairs per one phonon mode per unit volume.

A further analysis of the scheme can help us to establish differential equations for direct exciton, indirect exciton and phonon modes.

The medium becomes purely optical and the laser field is provided by the material as a phonon mode.

As with single molecules, a given solid material has characteristic phonon modes that can help an experimenter identify it.