Absence of the 1/8 -anomaly in oxygen isotope effect on YBa${}_2$Cu${}_3$O${}_y$

Abstract

We have prepared oxygen isotope exchanged crystals of impurity-free YBCO with various oxygen concentents, and examined pure doping ($p$) dependance of isotope effect on superconducting transition temperature. With decreasing oxygen contents, the isotope exponent $\alpha$ monotonously increases without any anomaly around $p=1/8$. The monotonous increase in $\alpha$ indicates that phonons are involved in the mechanism which causes the monotonous $T_c$ suppression with underdoping.

arXiv comment4 pages, 4 figures

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Cited by in corpus (5)

• Unconventional Superconductivity
• Leading theories of the cuprate superconductivity: a critique
• Isotope effect on the superconducting critical temperature of cuprates in the presence of charge order
• Anomalous isotope Effect in d-wave superconductors on the square lattice
• Anomalous isotope effect in BCS superconductors with two boson modes