4f bands in Ce heavy fermions and mixed valent compounds at T ≫ TK

Abstract

We report evidence of 4f band character in Ce 4f states at T ≫ TK using high-resolution angle-resolved resonant photoemission. The Ce intermetallic compound CePt2+x was grown and studied in situ by the method of MBE and was characterized by LEED, XPS and XAS. These new findings suggest a need for a re-examination of 4f photoemission in Ce compounds. © 1995