Energy dissipation in suspended micromechanical resonators at low temperatures

Authors
Harrington, DA Mohanty, P Roukes, ML
Citation
Da. Harrington et al., Energy dissipation in suspended micromechanical resonators at low temperatures, PHYSICA B, 284, 2000, pp. 2145-2146
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
284
Year of publication
2000
Part
2
Pages
2145 - 2146
Database
ISI
SICI code
0921-4526(200007)284:<2145:EDISMR>2.0.ZU;2-I
Abstract
We have measured mechanical dissipation in micron-sized single-crystal gall ium arsenide torsional resonators. The temperature dependence of the qualit y factor Q and the shift in resonance frequency can be explained by the pre sence of two-level systems. The dependence of Q on magnetic field is compat ible with the existence of localized electronic states around material defe cts. (C) 2000 Elsevier Science B.V. All rights reserved.