Electronic structure of the intermediate-valence compound EuNi
P
studied by soft X-ray photoemission spectroscopy
Kawasaki, Ikuto
; Kobata, Masaaki
; Fujimori, Shinichi
; Takeda, Yukiharu
; Yamagami, Hiroshi; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika*
We carried out angle-resolved photoemission (ARPES) experiments using soft X rays to investigate the electronic structure of the intermediate valence compound EuNi
P
. Both the Eu
and Eu
components arising from the 4
and 4
final states were observed in the valence spectra, directly confirming an intermediate character of Eu ions. The three-dimensional band structure was studied by ARPES measurements, and we found that the ARPES spectra up to just below the Fermi level can well be explained by a calculation based on the density-functional theory for the non-4
reference compound SrNi
P
. The heavy-fermion bands in EuNi
P
are thus considered to be formed through the hybridization between the dispersive valence bands, which resemble those for SrNi
P
, and the Eu
components located at the very vicinity of the Fermi level.