$T_c$ suppression in co-doped striped cuprates

Details $T_c$ suppression in co-doped striped cuprates $T_c$ suppression in co-doped striped cuprates

2000-12-06

arxiv.org/abs/cond-mat/0012080v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

We propose a model that explains the reduction of $T_c$ due to the pinning of stripes by planar impurity co-doping in cuprates. A geometrical argument about the planar fraction of carriers affected by stripe pinning leads to a a linear $T_c$ suppression as a function of impurity concentration $z$. The critical value $z_c$ for the vanishing of superconductivity is shown to scale like $T_c^2$ in the under-doped regime and becomes universal in the optimally- and over-doped regimes. Our theory agrees very well with the experimental data in single- and bi-layer cuprates co-doped with Zn, Li, Co, etc...

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