Finite size effect in Bi2Sr2CaCu2O(8+d) and YBa2Cu3O6.7 probed by the in-plane and out of plane penetration depths

Abstract

We report on a systematic finite size scaling analysis of in-plane penetration depth data taken on Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ epitaxially-grown films and single crystals, and of in-plane and out of plane data taken on YBa${}_2$Cu${}_3$O${}_{6.7}$ aligned powder. It is shown that the tails in temperature dependence of the penetration depths, appearing around the transition temperature, are fully consistent with a finite size effect. This uncovers the granular nature of these cuprates, consisting of superconducting homogeneous domains of nanoscale extent, embedded in a non-superconducting matrix.

9 pages, 8 figures

References in corpus (4)

• Systematic behaviour of the in-plane penetration depth in d-wave cuprates
• The specific heat of superfluids near the transition temperature
• Universal properties of cuprate superconductors
• Critical dynamics of superconducting BSCCO films

Cited by in corpus (15)

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• Implications evinced by the phase diagram, anisotropy, magnetic penetration depths, isotope effects and conductivities of cuprate superconductors
• Evidence for charged critical behavior in the pyrochlore superconductor RbOs2O6
• Evidence for 3D-xy critical properties in underdoped YBa2Cu3O7+x
• Relationship between and implications of the isotope and pressure effects on transition temperature, penetration depths and conductivities
• Critical fluctuations and pseudogap observed in the microwave conductivity of BSCCO and YBCO thin films
• Finite-size and pressure effects in YBa_2Cu_4O_8 probed by magnetic field penetration depth measurements
• Diamagnetism, Nernst signal, and finite size effects in superconductors above the transition temperature
• Gauge approach to superfluid density in underdoped cuprates
• Magnetic field induced 3D to 1D crossover in type II superconductors
• On the occurrence of Berezinskii-Kosterlitz-Thouless behavior in highly anisotropic cuprate superconductors
• Probing superconductivity in MgB2 confined to magnetic field tuned cylinders by means of critical fluctuations
• Implications of the isotope effects on the magnetization, magnetic torque and susceptibility
• Magnetic field induced finite size effect in type-II superconductors