Fig. 4: Changes in SC transition temperature for HEA SC thin films against irradiation damage.
From: High critical current density and high-tolerance superconductivity in high-entropy alloy thin films
a ρ(T) curves near Tc for the 200 keV Kr-ion-irradiated Ta–Nb–Hf–Zr–Ti HEA SC thin films with a thickness of 115 nm, where ρ(T) was normalized by ρn for comparison. The Tc of HEA SC thin films decreases gradually with an increase in dpa, but for dpa > 12.82 (left triangles), strikingly, the Tc exhibits an increase despite the increase in the dpa level (see the arrow direction). b Tc/Tc,0 with respect to dpa for representative SC materials with potential for practical applications, where Tc,0 represents the Tc of the pristine sample and p and n for Nb3Sn indicate proton irradiation and neutron irradiation, respectively. The Ta–Nb–Hf–Zr–Ti HEA SC thin films show a remarkably robust superconductivity against irradiation-induced disorder compared with that of the other SC materials. Half-transparent shades are guides to the eyes.
