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ID 18725
file
creator
Susaki, Tomofumi
Takeda, Yukiharu
Arita, Masashi
Mamiya, Kazutoshi
Fujimori, Atsushi
Shimizu, Naoki
Iga, Fumitoshi
abstract
We have performed a detailed temperature-dependent photoemission study of the conduction-band states in the Kondo insulator YbB12 using single crystalline samples. Measurements with improved energy resolution have revealed (pseudo)gaps of two energy scales. The size of the narrower gap ~10 meV and its disappearance at high temperatures are consistent with the temperature dependence of the electrical resistivity and the magnetic susceptibility. The larger pseudogap of ~100 meV depends on temperature even at room temperature. We discuss how the characteristics of the Kondo insulator are reflected in the conduction-band photoemission spectra.
journal title
Physical Review Letters
volume
Volume 82
issue
Issue 5
start page
992
end page
995
date of issued
1999-02-01
publisher
American Physical Society
issn
0031-9007
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) 1999 American Physical Society.
relation url
department
Graduate School of Science
Graduate School of Advanced Sciences of Matter
Hiroshima Synchrotron Radiation Center



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