Fermi-energy 5f spectral weight growth in Y1-xUxPd3

High-resolution small-spot resonant photoemission measurements of the Y1-xU xPd3 ahoy system have revealed the variation in the U 5f lineshape down to 1% uranium dilution. Qualitatively, the spectrum consists of a peak below E -F and a second peak impinging on E-F As x decreases from 1 to 0, the first peak moves toward E-F due to a process known as Fermi-level tuning. In add ition, the relative intensity of the E-F peak is observed to grow in accord ance with the onset of Kondo-like transport properties. (C) 1999 Elsevier S cience B.V. All rights reserved.