Electronic Structures of (Pb2Cu)Sr2EuxCen-xCu2O2n+6 (n=2,3)

The electronic structures of (Pb2Cu)Sr2EuxCen-xCu2O2n+6 (n=2,3) compounds which have fluorite blocks between two adjacent CuO2 layers have been studied by using ab-initio method. It is found that the anisotropy is enhanced by inserting the fluorite blocks. The Fermi velocity perpendicular to the CuO...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2003-05, Vol.72 (5), p.1138
Main Authors: Arai, Masao, Ikegawa, Sumio
Format: Article
Language:English
Online Access:Get full text
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Summary:The electronic structures of (Pb2Cu)Sr2EuxCen-xCu2O2n+6 (n=2,3) compounds which have fluorite blocks between two adjacent CuO2 layers have been studied by using ab-initio method. It is found that the anisotropy is enhanced by inserting the fluorite blocks. The Fermi velocity perpendicular to the CuO2 layers decreases as the thickness of fluorite blocks increases. The Eu substitution is found to affect both the atomic positions and electronic structures. The distance between apical oxygen and copper becomes shorter by the Eu substitution. The energy bands derived from oxygens in the fluorite blocks approach Fermi energy as the content of Eu substitution increases.
ISSN:0031-9015
1347-4073