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A technique to locally generate mechanical vibrations in freestandinggraphene using scanning tunneling microscopy (STM) is presented. The frequencyof the mechanical vibrations is tuned over nearly four decades and is centeredaround 10 Hz. The amplitude of the vibrations also changes over nearly threedecades centered on 1 nm. The oscillating motion is generated in two ways:first, by scanning the STM tip on the surface and second, by scanning the biasvoltage on the STM tip. The frequency and amplitude of the displacedfreestanding graphene is quantitatively transformed to the frequency andstrength of the locally generated pseudo-magnetic field for our specificgeometry.

journal of applied physics

Broad frequency and amplitude control of vibration in freestanding  graphene via scanning tunneling microscopy with calculated dynamic  pseudo-magnetic fields