Comment on Frictional Energy Dissipation due to Phonon Resonance in Two-Layer Graphene System

In their interesting study (Tribol Lett 70:113, 2022) Wei et al. have concluded that maxima in the energy dissipation rate as a function of external excitation frequency, as observed in their MD simulations of a two-layer graphene system, are due to a resonance between the excited phonons and the natural frequencies of the system vibrations. This hypothesis does not look justified. The maxima in the dissipation rate can be explained in a logically more simple way, in terms of usual mechanical resonance that is general in its nature and should take place for any type of dissipation mechanism, phononic, electronic or any other.

Automated summary

In their study, Wei et al. found that the maxima in the energy dissipation rate in a two-layer graphene system can be attributed to a resonance between the excited phonons and the natural frequencies of the system vibrations. However, this hypothesis may not be justified as the maxima can be explained by a more general mechanical resonance that applies to any type of dissipation mechanism.