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arXiv · 0710.5053

Oxygen-isotope effect on the superconducting gap in the cuprate superconductor Y_{1-x}Pr_xBa_2Cu_3O_{7-δ}

R. Khasanov·S. Strässle·K. Conder·E. Pomjakushina·A. Bussmann-Holder·H. Keller
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Abstract

The oxygen-isotope (^{16}O/^{18}O) effect (OIE) on the zero-temperature superconducting energy gap Δ_0 was studied for a series of Y_{1-x}Pr_xBa_2Cu_3O_{7-δ} samples (0.0\leq x\leq0.45). The OIE on Δ_0 was found to scale with the one on the superconducting transition temperature. These experimental results are in quantitative agreement with predictions from a polaronic model for cuprate high-temperature superconductors and rule out approaches based on purely electronic mechanisms.

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R. Khasanov, S. Strässle, K. Conder, E. Pomjakushina, A. Bussmann-Holder, H. Keller. 2007-10-26. Oxygen-isotope effect on the superconducting gap in the cuprate superconductor Y_{1-x}Pr_xBa_2Cu_3O_{7-δ}. https://doi.org/10.1103/physrevb.77.104530

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