2018/05/14 by Hodaka Kurokawa, H. Kurokawa, F. Nabeshima +3 · 2 citations
Engineering · Physics and Astronomy · #Atomic physics #Condensed matter physics #Coplanar waveguide #Current (fluid) #Field (mathematics) #Inverse #Magnetic field #Materials science #Microwave #Nuclear magnetic resonance #Optoelectronics #Physics #Physics of Superconductivity and Magnetism #Quality (philosophy) #Radio Frequency Integrated Circuit Design #Resonance (particle physics) #Resonator #Superconducting and THz Device Technology #Superconductivity #Vortex #cond-mat.supr-con
paper · pdf · doi:10.7567/1347-4065/aafb65
published in Japanese Journal of Applied Physics 58(3), 033001 (Institute of Physics)
arxiv created 2018/05/14 · openalex created_date 2018/05/17 · openalex publication_date 2019/02/11 · arxiv updated 2019/02/20 · openalex updated_date 2026/08/05
Abstract We fabricated a superconducting coplanar waveguide resonator with leads for dc bias, which enables an ac conductivity measurement under dc bias. The current and magnetic field dependences of resonance properties were measured, and hysteretic behavior was observed as a function of the dc driving current. The observed shifts in the inverse of the quality factor, Q −1 , and the center frequency, f 0 , were explained by considering both motion of vortices and suppression of the order parameter by the dc current. Our investigation revealed that the strongly pinned vortices have a small influence on f 0 , while they still affect Q −1 . Our results indicate that the accurate understanding of the dynamics of driven vortices is indispensable for a control of the resonance properties with a high precision.