Enhancing superconductivity of ultrathin YBa2Cu3O7-δ films by capping non-superconducting oxides

Enhancing superconductivity of ultrathin YBa₂Cu₃O_7-δ films by capping non-superconducting oxides

Bo Hai¹, Ren Tianshuang¹, Chen Zheng¹, Zhang Meng¹, Xie Yanwu^{1, 2, †}

The dependence of resistance on temperature for uncapped YBCO thin films of different thicknesses. The solid and dotted lines represent samples grown on TiO₂- and SrO-terminated SrTiO₃ substrates, respectively. The postannealing time for all these samples is 60 minutes.