Generating giant and tunable nonlinearity in a macroscopic mechanical resonator from a single chemical bond

Pu Huang, Jingwei Zhou, Liang Zhang, Dong Hou, Shaochun Lin, Wen Deng, Chao Meng, Changkui Duan, Chenyong Ju, Xiao Zheng, Fei Xue and Jiangfeng Du ()
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Pu Huang: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Jingwei Zhou: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Liang Zhang: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Dong Hou: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Shaochun Lin: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Wen Deng: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Chao Meng: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Changkui Duan: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Chenyong Ju: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Xiao Zheng: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China
Fei Xue: High Magnetic Field Laboratory, Chinese Academy of Science
Jiangfeng Du: National Laboratory for Physics Sciences at the Microscale, University of Science and Technology of China

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Nonlinearity in macroscopic mechanical systems may lead to abundant phenomena for fundamental studies and potential applications. However, it is difficult to generate nonlinearity due to the fact that macroscopic mechanical systems follow Hooke’s law and respond linearly to external force, unless strong drive is used. Here we propose and experimentally realize high cubic nonlinear response in a macroscopic mechanical system by exploring the anharmonicity in chemical bonding interactions. We demonstrate the high tunability of nonlinear response by precisely controlling the chemical bonding interaction, and realize, at the single-bond limit, a cubic elastic constant of 1 × 1020 N m−3. This enables us to observe the resonator’s vibrational bi-states transitions driven by the weak Brownian thermal noise at 6 K. This method can be flexibly applied to a variety of mechanical systems to improve nonlinear responses, and can be used, with further improvements, to explore macroscopic quantum mechanics.

Date: 2016
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DOI: 10.1038/ncomms11517

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