Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
We study NbTiN resonators by measurements of the temperature dependent resonance frequency and frequency noise. Additionally, resonators are studied covered with SiOx dielectric layers of various thicknesses. The resonance frequency develops a nonmonotonic temperature dependence with increasing SiOx layer thickness. The increase in the noise is independent of the SiOx …