Impact of Oxygen Diffusion on Superconductivity in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ Thin Films Studied by Positron Annihilation Spectroscopy

M. Reiner, T. Gigl, R. Jany +2

The oxygen deficiency $\delta$ in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ (YBCO) plays a crucial role for affecting high-temperature superconductivity. We applied (coincident) Doppler broadening spectro…