Relevance of electron-lattice coupling in cuprates superconductors

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.

arXiv comment4 pages, 3 figures

References in corpus (8)

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• Systematic behaviour of the in-plane penetration depth in d-wave cuprates
• Scaling of the specific heat in superfluid films
• c-Axis Superfluid Response and Pseudogap in High-Tc Superconductors
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Cited by in corpus (8)

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• Implications evinced by the phase diagram, anisotropy, magnetic penetration depths, isotope effects and conductivities of cuprate superconductors
• Relationship between and implications of the isotope and pressure effects on transition temperature, penetration depths and conductivities
• Evidence for charged critical behavior in the pyrochlore superconductor RbOs2O6
• Finite-size and pressure effects in YBa_2Cu_4O_8 probed by magnetic field penetration depth measurements
• Path Integral of the Holstein Model with a ${\varphi }^4$ on site potential
• Implications of the isotope effects on the magnetization, magnetic torque and susceptibility