Dissipation due to two-level systems in nano-mechanical devices

Seoanez, C.; Guinea, F.; Neto, A. H. Castro

Dissipation due to two-level systems in nano-mechanical devices

Authors

Seoanez, C.

Guinea, F.

Neto, A. H. Castro

Description

We 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 version