Magnetic-field dependence of the oxygen isotope effect on the magnetic penetration depth of hole-doped cuprate superconductors
Magnetic-field dependence of the oxygen isotope effect on the magnetic penetration depth of hole-doped cuprate superconductors
The magnetic-field dependence of the oxygen isotope $(^{16}\mathrm{O}∕^{18}\mathrm{O})$ effect (OIE) on the in-plane magnetic-field penetration depth ${\ensuremath{\lambda}}_{ab}$ was studied in the hole-doped high-temperature cuprate superconductors $\mathrm{Y}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{4}{\mathrm{O}}_{8}$, ${\mathrm{Y}}_{0.8}{\mathrm{Pr}}_{0.2}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}$, and ${\mathrm{Y}}_{0.7}{\mathrm{Pr}}_{0.3}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}$. It was found that the OIE on ${\ensuremath{\lambda}}_{ab}$ decreases by more than a factor of 2 with increasing magnetic field from …