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Oxygen-isotope effect on the in-plane penetration depth in underdoped Y_{1-x}Pr_xBa_2Cu_3O_{7-delta} as revealed by muon-spin rotation

R. Khasanov·A. Shengelaya·K. Conder·E. Morenzoni·I. M. Savić·H. Keller
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Abstract

The oxygen-isotope (^16O/^18O) effect (OIE) on the in-plane penetration depth $λ_{ab} (0)$ in underdoped Y_{1-x}Pr_xBa_2Cu_3O_{7-delta} was studied by muon-spin rotation. A pronounced OIE on $λ_{ab}^{-2}(0)$ was observed with a relative isotope shift of $Δλ^{-2}_{ab}/λ^{-2}_{ab}$=-5(2)% for x =0.3 and -9(2)% for x=0.4. It arises mainly from the oxygen-mass dependence of the in-plane effective mass $m_{ab}^{\ast}$. The OIE exponents of T_{c} and of $λ_{ab}^{-2}(0)$ exhibit a relation that appears to be generic for cuprate superconductors.

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R. Khasanov, A. Shengelaya, K. Conder, E. Morenzoni, I. M. Savić, H. Keller. 2002-01-11. Oxygen-isotope effect on the in-plane penetration depth in underdoped Y_{1-x}Pr_xBa_2Cu_3O_{7-delta} as revealed by muon-spin rotation. https://doi.org/10.1088/0953-8984%2F15%2F2%2F103

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