Damping in high-frequency metallic nanomechanical resonators

Abstract

We have studied damping in polycrystalline Al nanomechanical resonators by measuring the temperature dependence of their resonance frequency and quality factor over a temperature range of 0.1 - 4 K. Two regimes are clearly distinguished with a crossover temperature of 1 K. Below 1 K we observe a logarithmic temperature dependence of the frequency and linear dependence of damping that cannot be explained by the existing standard models. We attribute these phenomena to the effect of the two-level systems characterized by the unexpectedly long (at least two orders of magnitude longer) relaxation times and discuss possible microscopic models for such systems. We conclude that the dynamics of the two-level systems is dominated by their interaction with one-dimensional phonon modes of the resonators.

5 pages, 3 figures

References in corpus (6)

• Preparation and Detection of a Mechanical Resonator Near the Ground State of Motion
• Nanomechanical motion measured with precision beyond the standard quantum limit
• Surface dissipation in nanoelectromechanical systems: Unified description with the standard tunneling model and effects of metallic electrodes
• Quantum Friction in Nanomechanical Oscillators at Millikelvin Temperatures
• Dissipation due to tunneling two-level systems in gold nanomechanical resonators
• Evidence of universality in the dynamical response of micromechanical diamond resonators at millikelvin temperatures

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