Microwave Response of Superconductors with Paramagnetic Impurities
The study develops methods to predict how paramagnetic impurities affect microwave responses in conventional superconductors. By linking sub-gap quasiparticle states created by these impurities to conductivity, the authors predict anomalies in device performance like dissipation, quality factor, and frequency shifts. This shows that even low concentrations of paramagnetic disorder significantly impact superconducting device characteristics.