Interplane Transport and Superfluid Density in Layered Superconductors

Details Interplane Transport and Superfluid Density in Layered Superconductors Interplane Transport and Superfluid Density in Layered Superconductors

2001-02-25

arxiv.org/abs/cond-mat/0102455v1

Phys.Rev.B Vol.65, 134511 (2002).

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

We report on generic trends in the behavior of the interlayer penetration depth $\lambda_c$ of several different classes of quasi two-dimensional superconductors including cuprates, Sr$_2$RuO$_4$, transition metal dichalcogenides and organic materials of the $(BEDT-TTF)_2X$-series. Analysis of these trends reveals two distinct patterns in the scaling between the values of $\lambda_c$ and the magnitude of the DC conductivity: one realized in the systems with a Fermi liquid (FL) ground state and the other seen in systems with a marked deviation from the FL response. The latter pattern is found primarily in under-doped cuprates and indicates a dramatic enhancement (factor $\simeq 10^2$) of the energy scale $\Omega_C$ associated with the formation of the condensate compared to the data for the FL materials. We discuss implications of these results for the understanding of pairing in high-$T_c$ cuprates.

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