Approaching two-dimensional superconductivity in ultrathin DyBa${}_2$Cu${}_3$O${}_{7-\delta }$

R. D. Dawson, K. S. Rabinovich, D. Putzky +4

The temperature dependence of the superfluid density ${\rho }_s(T)$ has been measured for a series of ultrathin MBE-grown DyBa${}_2$Cu${}_3$O${}_{7-\delta }$ superconducting (SC) films by sub-mm wav…