Unusual T_c variation with hole concentration in Bi_2Sr_{2-x}La_xCuO_{6+δ}

Details Unusual T_c variation with hole concentration in Bi_2Sr_{2-x}La_xCuO_{6+δ} Unusual T_c variation with hole concentration in Bi_2Sr_{2-x}La_xCuO_{6+δ}

2000-01-24

arxiv.org/abs/cond-mat/0001339v1

Phys. Rev. B 61, 011321 (2000)

Physics

Condensed Matter

Superconductivity

RevTeX, 3 figures, to be published in the Physical Review B

Scientific paper

10.1103/PhysRevB.61.11321

We have investigated the $T_c$ variation with the hole concentration $p$ in the La-doped Bi 2201 system, Bi$_2$Sr$_{2-x}$La$_x$CuO$_{6+\delta}$. It is found that the Bi 2201 system does not follow the systematics in $T_c$ and $p$ observed in other high-$T_c$ cuprate superconductors (HTSC's). The $T_c$ vs $p$ characteristics are quite similar to what observed in Zn-doped HTSC's. An exceptionally large residual resistivity component in the inplane resistivity indicates that strong potential scatterers of charge carriers reside in CuO$_2$ planes and are responsible for the unusual $T_c$ variation with $p$, as in the Zn-doped systems. However, contrary to the Zn-doped HTSC's, the strong scatter in the Bi 2201 system is possibly a vacancy in the Cu site.

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