Enhanced Critical Currents and Irreversibility Fields in YBa${}_2$Cu${}_4$O${}_8$ Films through Ca-Substitution

Jiangteng Liu, Shuhei Funaki, Yuki Ogimoto +6

The intrinsic carrier concentration of superconducting materials may not be optimal, and different superconducting properties may have distinct optimal doping levels. Here, we show…