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Nano Research

Article Title

Visualizing nonlinear resonance in nanomechanical systems via single-electron tunneling

Authors

Xinhe Wang, Fert Beijing Research Institute, School of Microelectronics & Beijing Advanced Innovation Centre for Big Data and Brain Computing , Beihang University, Beijing 100191, China;State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China
Lin Cong, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China
Dong Zhu, Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei 230026, China
Zi Yuan, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China
Xiaoyang Lin, Fert Beijing Research Institute, School of Microelectronics & Beijing Advanced Innovation Centre for Big Data and Brain Computing , Beihang University, Beijing 100191, China
Weisheng Zhao, Fert Beijing Research Institute, School of Microelectronics & Beijing Advanced Innovation Centre for Big Data and Brain Computing , Beihang University, Beijing 100191, China
Zaiqiao Bai, Department of Physics, Beijing Normal University, Beijing 100875, China
Wenjie Liang, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Ximing Sun, Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering, Tsinghua University, Beijing 100084, China
Guang-Wei Deng, Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei 230026, China;Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Kaili Jiang, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China

Keywords

carbon nanotube, mechanical resonator, quantum dot, nonlinear, coupling

Abstract

Numerous reports have elucidated the importance of mechanical resonators comprising quantum-dot-embedded carbon nanotubes (CNTs) for studying the effects of single-electron transport. However, there is a need to investigate the single-electron transport that drives a large amplitude into a nonlinear regime. Herein, a CNT hybrid device has been investigated, which comprises a gate-defined quantum dot that is embedded into a mechanical resonator under strong actuation conditions. The Coulomb peak positions synchronously oscillate with the mechanical vibrations, enabling a single-electron "chopper" mode. Conversely, the vibration amplitude of the CNT versus its frequency can be directly visualized via detecting the time-averaged single-electron tunneling current. To understand this phenomenon, a general formula is derived for this time-averaged single-electron tunneling current, which agrees well with the experimental results. By using this visualization method, a variety of nonlinear motions of a CNT mechanical oscillator have been directly recorded, such as Duffing nonlinearity, parametric resonance, and double-, fractional-, mixed- frequency excitations. This approach opens up burgeoning opportunities for investigating and understanding the nonlinear motion of a nanomechanical system and its interactions with electron transport in quantum regimes.

Publisher

Tsinghua University Press

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