Site-selective oxygen isotope effect on the magnetic field penetration depth in underdoped Y${}_{0.6}$Pr${}_{0.4}$Ba${}_2$Cu${}_3$O${}_{7-\delta }$

R. Khasanov, A. Shengelaya, E. Morenzoni +7

We report site-selective oxygen isotope (${}^{16}$O/${}^{18}$O) effect (OIE) measurements on the in-plane penetration depth ${\lambda }_{ab}$ in underdoped Y${}_{0.6}$Pr${}_{0.4}$Ba${}_2$Cu${}_3$O$_{7…