A. Buzdin et al., QUASI-2D FLUCTUATION CONTRIBUTION IN LONDON PENETRATION DEPTH IN YBA2CU3O7-DELTA, Physica. C, Superconductivity, 227(3-4), 1994, pp. 365-370
The results of precise measurements of anisotropic London penetration
depths lambda(ab)(T) and chi(c)(T) in YBa2Cu3O7-delta are presented. I
t provides the first experimental evidence of a fluctuation contributi
on to the London penetration depth near T(c). The obtained results are
explained in the framework of the Gaussian fluctuation theory in quas
i-2D superconductors.