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Modulation-free bismuth-lead cuprate superconductors: $BiPbSr_{1+x}L_{1-x}CuO_6$ and $BiPbSr_2Y_{1-x}Ca_xCu_2O_8$

Manivannan, V and Gopalakrishnan, J and Rao, CNR (1991) Modulation-free bismuth-lead cuprate superconductors: $BiPbSr_{1+x}L_{1-x}CuO_6$ and $BiPbSr_2Y_{1-x}Ca_xCu_2O_8$. In: Physical Review B, 43 (10). pp. 8686-8689.

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Modulation-free $BiPbSrLCuO_6$ (L=La, Pr, Nd) and $BiPbSr_2YCu_2O_8$, which are isotypic with the n=1 and 2 members of the $Bi_2Sr_2Ca_{n-1}Cu_nO_{2n+4}$ family, have been prepared and characterized. These parent compounds are nonsuperconducting, but when doped with holes by substitution chemistry give modulation-free superconducting cuprates of the general formulas $BiPbSr_{1+x}L_{1-x}CuO_6$ and $BiPbSr_2Y_{1-x}Ca_xCu_2O_8$, exhibiting maximum $T_c$'s of 24 and 85 K, respectively. Significantly, the hole concentration at the maximum $T_c$ is 0.12 in the cuprate family with a single Cu-O layer and 0.22 in that with two Cu-O layers.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 14 Sep 2006
Last Modified: 19 Sep 2010 04:31
URI: http://eprints.iisc.ac.in/id/eprint/8543

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