Coupling between quantum Hall state and electromechanics in suspended graphene resonator

摘要

Using graphene resonator, we perform electromechanical measurements inquantum Hall regime to probe the coupling between a quantum Hall (QH) systemand its mechanical motion. Mechanically perturbing the QH state throughresonance modifies the DC resistance of the system and results in aFano-lineshape due to electronic interference. Magnetization of the systemmodifies the resonator's equilibrium position and effective stiffness leadingto changes in resonant frequency. Our experiments show that there is anintimate coupling between the quantum Hall state and mechanics - electrontransport is affected by physical motion and in turn the magnetization modifiesthe electromechanical response.