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VOLUME 49 (1989) | ISSUE 3 | PAGE 163
Study of the 3d band of copper in Y1 Ba2Cu3O7-x
The results of an experimental study of the structure of a 3of band of copper in a superconducting film at two temperatures (300 К and 80 К) are presented. A smaller overlap of the orbitals of the Cu-O bonds and the effective repulsion potential of holes has been observed at a low temperature.