Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors
By H. Eisaki, N. Kaneko, D. Feng, A. Damascelli, P. Mang, K. Shen, Zhi-xun Shen, M. Greven. 2003
350 citations recorded by the source corpus.
We examine the effect on the superconducting transition temperature (T c ) of chemical inhomogeneities in Bi 2 Sr 2 CuO 6 + δ and Bi 2 Sr 2 CaCu 2 O 8 + δ single crystals. Cation disorder at the Sr crystallographic site is inherent in these materials and strongly affects the value of T c . Partial substitution of Sr by Ln (Ln = La, Pr, Nd, Sm, Eu, Gd, and Bi) in Bi 2 Sr 1 . 6 Ln 0 . 4 CuO 6 + δ results in a monotonic decrease of T c with increasing ionic radius mismatch. By minimizing Sr site disorder at the expense of Ca site disorder, we demonstrate that the T c of Bi 2 Sr 2 CaCu 2 O 8 + δ can be increased to 96 K. Based on these results we discuss the effects of chemical inhomogeneity in other bulk high-temperature superconductors.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/66a54cc9aa95dca1507196bd97d7b36b8f92414a
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Citations in the corpus
- Two gaps make a high-temperature superconductor? (2007, methodology): “We have therefore selected Bi2Sr2CaCu2O8+δ (Bi2212), YBa2Cu3O7−δ (Y123), Tl2Ba2CuO6+δ (Tl2201) and HgBa2CuO4+δ (Hg1201), which have been extensively investigated and are all characterized by T max c ∼ 95K [ 73 ] (with particular emphasis on Bi2212, for which the most extensive set of single-particle”
- Defects in correlated metals and superconductors (2007, background): “Recent experiments in which the various possible substitution sites have been systematically used to dope Bi2212 have confirmed elegantly this correlation between the optimum Tc and the proximity of the substitution site to the CuO2 plane (Eisaki et al., 2004).”