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ID 18729
file
creator
Susaki, Tomofumi
Konishi, Takehisa
Sekiyama, Akira
Mizokawa, Takashi
Fujimori, Atsushi
Iwasaki, Takeshi
Ueda, Shigenori
Matsushita, Tomohiro
Suga, Shigemasa
Ishii, Hiroyoshi
Iga, Fumitoshi
Kasaya, Mitsuo
abstract
We have studied the effect of Lu substitution on the Kondo insulator YbB12 by high-resolution photoemission. Comparison of the spectra of YbB12, Yb0.5Lu0.5B12, and LuB12 reveals that the density of states (DOS) of the B sp-derived conduction band near the Fermi level is reduced in YbB12 over a rather wide (∼ 40 meV) energy region. Lu substitution (i) recovers the reduced B sp DOS, (ii) shifts the Yb 4f-derived Kondo peak towards higher binding energy, and (iii) decreases the Yb valence. These results are consistently analyzed using the Anderson-impurity model, and imply interaction between the Yb 4f ions mediated by the Yb 4f-B sp hybridization in YbB12.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 56
issue
Issue 21
start page
13 727
end page
13 720
date of issued
1997-12-01
publisher
American Physical Society
issn
0163-1829
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) 1997 American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter