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ID 19287
file
creator
Kobayashi, Kenichi
Narimura, Takamasa
Baltzer, Peter
Suemitsu, Toshiaki
Sasakawa, Tetsuya
abstract
Ce 4f derived states at the Fermi level (EF) of the isostructural single crystals CeRhAs, CeRhSb, and CePtSn were observed directly by means of high-resolution (ΔE = 18-20 meV), low-temperature (10-12 K) photoemission spectroscopy with a photon energy of hv = 126 eV. The Ce 4f spectrum for the Kondo semiconductor CeRhAs exhibited no peak structure near EF, and its spectral intensity decreases monotonically above the binding energy ∼90 meV, thereby forming a large gap structure. The spectrum of the semimetal CeRhSb is enhanced above ∼120 meV, but decreases steeply above ∼13 meV, which indicates the existence of a narrow pseudogap at EF. A clear crystal field excitation at ∼27 meV, and a weak Kondo resonance at EF, were found in the metal CePtSn.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 66
issue
Issue 15
start page
155202-1
end page
155202-4
date of issued
2002-10-03
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2002 The American Physical Society.
relation url
department
Graduate School of Science
Graduate School of Advanced Sciences of Matter
Hiroshima Synchrotron Radiation Center