Nanoelectromechanical resonators from thin superconducting crystals of BSCCO

High transition-temperature superconductors host a rich variety of quantum phases. Cavity optomechanics techniques could be helpful in a sensitive detection of long-wavelength phonon modes carrying imprints of the electronic phases. Here we present mechanical resonators fabricated with thin exfoliated crystals of BSCCO at low temperatures. For mechanical readout, we couple their motion to a coplanar waveguide microwave cavity fabricated with a superconducting alloy of molybdenum-rhenium. We perform spectroscopic and time-domain measurements to understand dissipation in these systems. Our results suggest that the performance of these devices is limited by the contact resistance arising from the insulating outer layer, and interlayer friction.