Oxygen isotope effect on the superconductivity and stripe phase in La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$

Abstract

The oxygen isotope effect on the superconductivity, stripe phase and structure transition is systematically investigated in La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$ with static stripe phase. Substitution of ${}^{16}$O by ${}^{18}$O leads to a decrease in superconducting transition temperature T${}_C$, while enhances the temperature of the structural transition from low-temperature-orthorhombic (LTO) phase to low-temperature-tetragonal (LTT) phase. Compared to the Nd free sample, a larger isotope effect on $T_C$ is observed in La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$. These results indicate that the distortion of CuO${}_2$ plane suppresses the superconductivity, giving a direct evidence for the competing of stripe phase and superconductivity because the distortion of CuO${}_2$ plane enhances the stripe phase.

4 pages, 5 figures

References in corpus (3)

• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• Charge order, metallic behavior and superconductivity in La_{2-x}Ba_xCuO_4 with x=1/8
• Giant isotope effect and spin state transition induced by oxygen isotope exchange in ($P{r}_{1-x}S{m}_x{)}_{0.7}C{a}_{0.3}Co{O}_3$

Cited by in corpus (2)

• Negative Oxygen Isotope Effect on the Static Spin Stripe Order in La_(2-x)Ba_xCuO_4 (x = 1/8)
• Isotope effect on superconductivity in Josephson coupled stripes in underdoped cuprates