期刊
PHYSICAL REVIEW B
卷 67, 期 14, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.67.140501
关键词
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Bismuthate superconductor Ba1-xKxBiO3 (x=0.27-0.49, T-c=25-32 K) grown by an electrolysis technique was studied by electron diffraction and high-resolution electron microscopy. The crystalline structure thereof has been found to be noncubic, noncentrosymmetric and of the layered nature, with the lattice parameters aapproximate toa(p), capproximate to2a(p) (a(p) is a simple cubic perovskite cell parameter) containing an ordered arrangement of barium and potassium. The evidence for the layered nature of the bismuthate superconductor removes the principal crystallographic contradiction between bismuthate and cuprate high-T-c superconductors.
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