3 papers
cond-mat.supr-con2025
Higgs-mode-induced instability and kinetic inductance in strongly dc-biased dirty-limit superconductors
Takayuki Kubo
A perturbative ac field superposed on a dc bias () is known to excite the Higgs mode in superconductors. The dirty limit, where disorder enhances the Higgs resonance, provides…
cond-mat.supr-con2024
How High a Field Can Be and Has Been Achieved in Superconducting Bulk Niobium Cavities Across Different RRR Values?
Takayuki Kubo
This Brief Note explores the relationship between residual resistivity ratio (RRR) and the maximum surface magnetic field in superconducting bulk niobium (Nb) cavities. Data from t…
cond-mat.supr-con2024
On the Applicability Ranges of Tc Formulas for Proximity-Coupled Thin SN and SS Bilayers
Takayuki Kubo
This brief note revisits the well-established formulas for proximity-coupled thin superconductor-normal conductor (SN) and superconductor-superconductor (SS) bilayers, highli…