Abstract
Potassium manganate, K2MnO4, has an electronic structure of d1. As it has one unpaired electron, it has exchange interaction between the core and valence electrons in the photoemission process. It is an interesting question whether manganese compounds of high oxidation number and strong covalent bonding exhibit satellite peaks in XPS spectra, or not. This submission provides information that may be useful for the discussion of the photoemission process. In this study, XPS core- and valence-band level spectra including the energy loss parts were taken for the in situ fractured surfaces of K2MnO4 crystals. Crystals grown from an aqueous solution and stocked in KOH solution were used because the sample is moisture sensitive.
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