Volume 78, Number 6, June 2007
|Number of page(s)||6|
|Published online||24 May 2007|
Dissipation due to two-level systems in nano-mechanical devices
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
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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