Probing magnetization and vortex dynamics in Bi₂Sr₂CaCu₂O₈ micromechanical resonator driven using radiation pressure drive.

Techniques from cavity optomechanics provide exquisite control over the motion of mechanical resonator. Here we realize a cavity-optomechanical system consisting of a microwave cavity and a mechanical oscillator from an exfoliated crystal of Bi₂Sr₂CaCu₂O₈. We use the radiation-pressure based mechanical drive (optomechanically induced transparency) to probe the electromechanical properties of the mechanical oscillator. In the presence of a magnetic field, we observe a hysteresis in the oscillator's resonant frequency, which can be understood within the critical state model. While sweeping the magnetic field, we observe abrupt jumps in the mechanical frequency, suggesting the charged nature of the vortex core.