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c-Axis Superfluid Response and Pseudogap in High-Tc Superconductors | | C. Panagopoulos
; J.R. Cooper
; T. Xiang
; Y.S. Wang
; C. W. Chu
; | | Date: |
9 Nov 1999 | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | 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. | | Source: | arXiv, cond-mat/9911116 | | Services: | Forum | Review | PDF | Favorites | |
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