Abstract
We discuss the electronic state of Ni atoms in Ni metal and of Ni impurity in Cu and Au metals from the viewpoint of 3 d configuration interaction (CI) using the Anderson impurity model including atomic multiplets. On the basis of the discussion, we give an interpretation for the Ni 2 p -core X-ray photoemission spectrum (2 p XPS) in Ni metal and Ni impurity systems and 3 d photoemission spectra in Ni metal. The interpretation is, furthermore, shown to be consistent with the previous one for the 2 p →3 d circularly polarized X-ray absorption in ferromagnetic Ni using the CI approach.
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