2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/130347We analyze the dissipation of the frequency vibrations of nano-mechanical devices. We show that the coupling between flexural modes and two-level systems leads to sub-ohmic dissipation. The inverse quality factor of the low energy vibrations depends on temperature as $Q^{-1} (T) \approx Q_0 + C T^{1/3}$, providing a quantitative description of the experimental data.6 pages, 4 figures, published versionMesoscale and Nanoscale PhysicsMaterials ScienceOther Condensed Mattertext