Metallic state in La-doped YBa${}_2$Cu${}_3$O${}_y$ thin films with $n$-type charge carriers

S. W. Zeng, X. Wang, W. M. Lü +10

We report hole and electron doping in La-doped YBa${}_2$Cu${}_3$O${}_y$(YBCO) thin films synthesized by pulsed laser deposition technique and subsequent \emph{in-situ} postannealing in o…