The electronic-energetic structure of the valence band CeCu₂Si₂, a superconductor with anomalous properties, is investigated. At the Fermi level (E_F) of the compound under study, the intensive peak of the density of filled electronic states g (E_F) is formed. The nature of its appearance is caused by the influence of the energetically stable 3d¹⁰-configuration of Cu, which activates electronic states of atoms-components, Ce and Si, up to the Fermi level. The appearance of electrons of Ce with the 4f-symmetry in the vicinity of E_g leads to the formation of a peak of g(E_F), which transforms into the Abricosov - Sul resonance at low temperatures.

• Ніколюк Петро Карпович (фізико-математичні науки)

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