Print Email Facebook Twitter Mechanical dissipation in MoRe superconducting metal drums Title Mechanical dissipation in MoRe superconducting metal drums Author Yanai, S. (TU Delft QN/Steele Lab) Singh, V. (TU Delft QN/Mol. Electronics & Devices) Yuan, M. (TU Delft QN/Steele Lab) Gely, M.F. (TU Delft QN/Steele Lab) Bosman, S.J. (TU Delft QN/Steele Lab) Steele, G.A. (TU Delft QN/Steele Lab) Date 2017-02-20 Abstract We experimentally investigate dissipation in mechanical resonators made of a disordered superconducting thin film of a Molybdenum-Rhenium(MoRe) alloy. Electrostatically driving the drum with a resonant AC voltage, we detect its motion using a superconducting microwave cavity. From the temperature dependence of mechanical resonance frequencies and quality factors, we find evidence for non-resonant, mechanically active two-level systems (TLSs) limiting its quality factor at low temperature. In addition, we observe a strong suppression of mechanical dissipation at large mechanical driving amplitudes, suggesting an unconventional saturation of the non-resonant TLSs. These observations shed light on the mechanism of mechanical damping in superconducting drums and routes towards understanding dissipation in such devices. To reference this document use: http://resolver.tudelft.nl/uuid:3898ff66-5ce9-4d79-a25a-afcf73e79e82 DOI https://doi.org/10.1063/1.4976831 Embargo date 2018-02-21 ISSN 0003-6951 Source Applied Physics Letters, 110 (8) Part of collection Institutional Repository Document type journal article Rights © 2017 S. Yanai, V. Singh, M. Yuan, M.F. Gely, S.J. Bosman, G.A. Steele Files PDF 1.4976831.pdf 991.63 KB Close viewer /islandora/object/uuid:3898ff66-5ce9-4d79-a25a-afcf73e79e82/datastream/OBJ/view