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ID 18726
file
creator
Susaki, Tomofumi
Sekiyama, Akira
Kobayashi, Kensuke
Mizokawa, Takashi
Fujimori, Atsushi
Tsunekawa, Masanori
Muro, Takayuki
Matsushita, Tomohiro
Suga, Shigemasa
Ishii, Hiroyoshi
Hanyu, Takaaki
Miyahara, Tsuneaki
Iga, Fumitoshi
Kasaya, Mitsuo
abstract
We have studied the low-energy electronic structure of a Kondo insulator YbB12 by high-resolution photoemission spectroscopy. A "Kondo peak" is observed ~25 meV below the Fermi level, which agrees well with the Kondo temperature, whereas the gap at the Fermi level is found much smaller, indicating that the magnetic properties at higher temperatures (>75 K) are indeed determined by the Kondo effect in spite of the gap formation at lower temperatures. A renormalized band picture is presented to describe the coexistence of the Kondo peak and the transport gap as well as the highly asymmetric line shape of the Kondo peak.
journal title
Physical Review Letters
volume
Volume 77
issue
Issue 20
start page
4269
end page
4272
date of issued
1996-11-11
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) 1996 American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter