Angle-resolved photoemission spectroscopy study of CeTe2

The Ce 4f electronic structure of a CDW system CeTe2 has been investigated using high-resolution angle-resolved photoemission spectroscopy (ARPES). By employing the fine-structure (FS) resonance, the Ce 4f ARPES spectra have been measured. The FS resonance ARPES shows a typical two-peak structure with the peaks at similar to -4 and similar to -1 eV, in which the latter peak shifts with increasing emission angle by similar to 300 meV. The Ce 4f states have the negligibly small intensity near E-F, reflecting the minor contribution from Ce 4f electrons to the metallic ground state of CeTe2. This implies that Te(1) 5p and Ce 5d electrons are involved in the CDW formation in CeTe2. (c) 2006 Elsevier B.V. All rights reserved.