Damping of a Micro-electromechanical Resonator in the Presence of Quantum Turbulence Generated by a Quartz Tuning Fork

A micro-electromechanical resonator, consisting of a 125 × 125 μ m 2 center plate suspended 2 μ m above a substrate, was immersed in 4 He along with a quartz tuning fork. The tuning fork was placed 5 mm above the resonator and was used to generate turbulence. The damping of the resonator was investi...

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Bibliographic Details
Published inJournal of low temperature physics Vol. 201; no. 1-2; pp. 4 - 10
Main Authors Barquist, C. S., Jiang, W. G., Gunther, K., Lee, Y., Chan, H. B.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.10.2020
Springer Nature B.V
Subjects
Characterization and Evaluation of Materials
Condensed Matter Physics
Damping
Low temperature physics
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Quantum turbulence
Quartz
Resonators
Substrates
Tuning
Quantum turbulence
Mechanical resonator
Vortex
He II
Critical velocity
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Summary:A micro-electromechanical resonator, consisting of a 125 × 125 μ m 2 center plate suspended 2 μ m above a substrate, was immersed in 4 He along with a quartz tuning fork. The tuning fork was placed 5 mm above the resonator and was used to generate turbulence. The damping of the resonator was investigated in the presence of turbulence generated by the tuning fork. We observe a velocity, v c ≃ 5 mm s - 1 , above which the damping on the resonator is drastically reduced for all tuning fork velocities studied. We attribute this change in damping to the shedding and capture of vortices.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-019-02301-8