Tuning the interlayer spacing in high T_c superconductors: penetration depth and two-dimensional superfluid density

Details Tuning the interlayer spacing in high T_c superconductors: penetration depth and two-dimensional superfluid density Tuning the interlayer spacing in high T_c superconductors: penetration depth and two-dimensional superfluid density

2008-07-03

arxiv.org/abs/0807.0561v1

Phys. Rev. Lett. 102, 087002 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.102.087002

Substantial control of the interlayer spacing in Bi-based high temperature superconductors has been achieved through the intercalation of guest molecules between the superconducting layers. Measurements using implanted muons reveal that the penetration depth increases with increasing layer separation while T_c does not vary appreciably, demonstrating that the bulk superfluid density is not the determining factor controlling T_c. Our results strongly suggest that the superfluid density appearing in the Uemura scaling relation n_s/m* \propto T_c should be interpreted as the two dimensional density within the superconducting layers, which we find to be constant for each class of system investigated.

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