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de Bonis SL, Urgell C, Yang W, Samanta C, Noury A, Vergara-Cruz J, Dong Q, Jin Y, Bachtold A. Ultrasensitive Displacement Noise Measurement of Carbon Nanotube Mechanical Resonators. NANO LETTERS 2018; 18:5324-5328. [PMID: 30062893 PMCID: PMC6089494 DOI: 10.1021/acs.nanolett.8b02437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Mechanical resonators based on a single carbon nanotube are exceptional sensors of mass and force. The force sensitivity in these ultralight resonators is often limited by the noise in the detection of the vibrations. Here, we report on an ultrasensitive scheme based on a RLC resonator and a low-temperature amplifier to detect nanotube vibrations. We also show a new fabrication process of electromechanical nanotube resonators to reduce the separation between the suspended nanotube and the gate electrode down to ∼150 nm. These advances in detection and fabrication allow us to reach [Formula: see text] displacement sensitivity. Thermal vibrations cooled cryogenically at 300 mK are detected with a signal-to-noise ratio as high as 17 dB. We demonstrate [Formula: see text] force sensitivity, which is the best force sensitivity achieved thus far with a mechanical resonator. Our work is an important step toward imaging individual nuclear spins and studying the coupling between mechanical vibrations and electrons in different quantum electron transport regimes.
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Affiliation(s)
- S L de Bonis
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
| | - C Urgell
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
| | - W Yang
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
| | - C Samanta
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
| | - A Noury
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
| | - J Vergara-Cruz
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
| | - Q Dong
- Centre de Nanosciences et de Nanotechnologies, CNRS , University of Paris-Sud, University of Paris-Saclay, C2N Marcoussis, 91460 Marcoussis , France
| | - Y Jin
- Centre de Nanosciences et de Nanotechnologies, CNRS , University of Paris-Sud, University of Paris-Saclay, C2N Marcoussis, 91460 Marcoussis , France
| | - A Bachtold
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
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Vikström A, Eriksson AM, Kulinich SI, Gorelik LY. Nanoelectromechanical Heat Engine Based on Electron-Electron Interaction. PHYSICAL REVIEW LETTERS 2016; 117:247701. [PMID: 28009195 DOI: 10.1103/physrevlett.117.247701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Indexed: 06/06/2023]
Abstract
We theoretically show that a nanoelectromechanical system can be mechanically actuated by a heat flow through it via an electron-electron interaction. In contrast to most known actuation mechanisms in similar systems, this new mechanism does not involve an electronic current nor external ac fields. Instead, the mechanism relies on deflection-dependent tunneling rates and a heat flow which is mediated by an electron-electron interaction while an electronic current through the device is prohibited by, for instance, a spin-valve effect. Therefore, the system resembles a nanoelectromechanical heat engine. We derive a criterion for the mechanical instability and estimate the amplitude of the resulting self-sustained oscillations. Estimations show that the suggested phenomenon can be studied using available experimental techniques.
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Affiliation(s)
- A Vikström
- Department of Physics, Chalmers University of Technology, Kemigården 1, SE-412 96 Göteborg, Sweden
| | - A M Eriksson
- Department of Physics, Chalmers University of Technology, Kemigården 1, SE-412 96 Göteborg, Sweden
| | - S I Kulinich
- B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, Prospect Nauky 47, Kharkov 61103, Ukraine
| | - L Y Gorelik
- Department of Physics, Chalmers University of Technology, Kemigården 1, SE-412 96 Göteborg, Sweden
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