Open AccessHigh-resolution photoemission study of CeRu 2 4 f
Author(s) -
SeeHun Yang,
Hiroshi Kumigashira,
T. Yokoya,
A. Chainani,
T. Takahashi,
Hiroyuki Takeya,
Kazuo Kadowaki
Publication year - 1996
Publication title -
physical review. b, condensed matter
Language(s) - English
Resource type - Journals
eISSN - 1095-3795
pISSN - 0163-1829
DOI - 10.1103/physrevb.53.r11946
Subject(s) - physics , photoemission spectroscopy , electron , electronic structure , atomic physics , character (mathematics) , crystallography , condensed matter physics , nuclear magnetic resonance , x ray photoelectron spectroscopy , nuclear physics , chemistry , geometry , mathematics
High-resolution low-temperature photoemission spectroscopy was performed for CeRu2 to study the nature of low-lying excitations around the Fermi level (EF). It was found that the photoemission spectrum near EF shows two well-resolved peaks at and about 270 meV below EF, which are ascribed to the tail of the Ce 4 f1 final state located just above EF and its spin-orbit satellite (ΔSO∼270 meV), respectively. This suggests that the many-body-correlation effect is necessary for understanding the electronic structure near EF of CeRu2, although the Ce 4f electron exhibits a substantially itinerant character through the strong hybridization with the conduction electrons
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