Superconductor-to-insulator transition in the Bi2Sr3-xYxCu2O8+y system

Subramanian, M. A. ; Strzelecki, A. R. ; Gopalakrishnan, J. ; Sleight, A. W. (1988) Superconductor-to-insulator transition in the Bi2Sr3-xYxCu2O8+y system Journal of Solid State Chemistry, 77 (1). pp. 196-199. ISSN 0022-4596

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The compositions Bi2Sr3-xYxCu2O8 have been prepared with the structure of superconducting Bi2Sr3-xCaxCu2O8. The range of x in Bi2Sr3-xYxCu2O8 is roughly 0.2 to 1.0 and chemical analysis shows that the CuIII concentration increases with decreasing x. The compositions are superconducting (Tc ~65-72 K) for x = ~0.2 to 0.4. Insulating behavior is observed in the region from x = 0.5 to 1.0. This insulating region would not be expected if the Bi 6p band overlapped the Fermi level, as indicated by recent band structure calculations for Bi2Sr2CaCu2O8.

Item Type:Article
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ID Code:12403
Deposited On:10 Nov 2010 06:21
Last Modified:03 Jun 2011 05:09

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