The electronic structure of the YbCu5-xAgx system, which belongs to a series of dense Kondo compounds, is studied by high-resolution photoemission spectroscopy. A sharp Yb 4f-related peak, which is regarded as the Kondo peak, was observed just below the Fermi level for each compounds. As x decreases, the intensity of the Kondo peak decreases and its energy position is shifted towards the Fermi level.
PACS numbers: 71.27.+a, 75.30.Mb, 79.60.--i
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