| Issue |
EPL
Volume 78, Number 6, June 2007
|
|
|---|---|---|
| Article Number | 60002 | |
| Number of page(s) | 6 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/78/60002 | |
| Published online | 24 May 2007 | |
Dissipation due to two-level systems in nano-mechanical devices
1
Instituto de Ciencia de Materiales de Madrid, CSIC - Cantoblanco, E28049 Madrid, Spain
2
Department of Physics, Harvard University - Cambridge, MA 02138, USA
3
Department of Physics, Boston University - 590 Commonwealth Avenue, Boston, MA 02215, USA
Received:
13
February
2007
Accepted:
2
May
2007
We analyze the dissipation of the 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 flexural modes of low frequencies depends on temperature as 
, providing a quantitative description of the experimental data.
PACS: 03.65.Yz – Decoherence; open systems; quantum statistical methods / 62.40.+i – Anelasticity, internal friction, stress relaxation, and mechanical resonances / 85.85.+j – Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
© Europhysics Letters Association, 2007
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