c-Axis Superfluid Response and Pseudogap in High-Tc Superconductors

Abstract

To gain insight into the out-of-plane electrodynamics of high-$T_c$ superconduct ors we have measured the absolute values and temperature dependence of the c-a xis magnetic penetration depth ${\lambda }_c(T)$ for two typical single layer high -$T_c$ cuprates, La${}_{2-x}$Sr${}_x$CuO${}_4$ and HgBa${}_2$CuO${}_{4+x}$ as a function o f doping. A distinct change in the behaviour of ${\lambda }_c$ is observed near 0. 20 holes/Cu, which is related to the opening of the normal state pseudogap. The variation of ${\lambda }_c$ with doping is qualitatively similar to that of the in -plane component, ${\lambda }_{ab}$, which suggests that the c-axis superfluid r esponse is mainly governed by the superconducting condensation energy. The stron g doping dependence of ${\lambda }_c(0)$ for p<0.20 provides an explanation for the discrepancies in the literature.

4 pages, 2 figures

References in corpus (11)

• The pseudogap in high-temperature superconductors: an experimental survey
• Destruction of the Fermi Surface in Underdoped High Tc Superconductors
• The Unusual Superconducting State of Underdoped Cuprates
• Evolution of the Fermi surface with carrier concentration in Bi_2Sr_2CaCu_2O_{8+δ}
• Pairing Fluctuation Theory of Superconducting Properties in Underdoped to Overdoped Cuprates
• c axis superfluid response of Copper-Oxide superconductors
• Effects of carrier concentration on the superfluid density of high-T_c cuprates
• Global and Local Measures of the Intrinsic Josephson Coupling in Tl2Ba2CuO6
• Frustrated kinetic energy, the optical sum rule, and the mechanism of superconductivity
• c-axis penetration depth of Hg-1201 single crystals
• Low Temperature Superfluid Response of High-Tc Superconductors

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