Versatile control of the superconducting transition temperature in anti-ThCr2Si2-type Y2O2Bi via H, Li, or F doping.

In Y2O2Bi with Bi square net, H substitution and Li intercalation led to higher superconducting transition temperature (Tc), while F substitution led to lower Tc, where Tc is universally scaled by unit cell tetragonality c/a. Li intercalated Y2O2Bi showed a higher Tc than previously reported Y2O2Bi even for the similar c/a.