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Relevance of electron-lattice coupling in cuprates superconductors

T. Schneider·R. Khasanov·K. Conder·H. Keller
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Abstract

We study the oxygen isotope (^{16}O,^{18}O) and finite size effects in Y_{1-x}Pr_{x}Ba_{2}Cu_{3}O_{7-δ} by in-plane penetration depth (λ_{ab}) measurements. A significant change of the length L_{c} of the superconducting domains along the c-axis and λ_{ab}^{2} is deduced, yielding the relative isotope shift ΔL_{c}/L_{c}\approx Δλ_{ab}^{2}/λ_{ab}^{2}\approx -0.14 for x=0, 0.2 and 0.3. This uncovers the existence and relevance of the coupling between the superfluid, lattice distortions and anharmonic phonons which involve the oxygen lattice degrees of freedom.

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T. Schneider, R. Khasanov, K. Conder, H. Keller. 2003-02-20. Relevance of electron-lattice coupling in cuprates superconductors. https://doi.org/10.1088/0953-8984%2F15%2F50%2Fl03

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