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eng
Author
Sekiya, Yasuteru
Hada, Hirofumi
Description
The static spin susceptibility and spectral function of the system corresponding to the magnetic-ion-diluted Kondo insulator is calculated using the framework of dynamical mean-field theory with a coherent potential approximation. The system is described by a periodic Anderson model with randomly distributed impurity sites which have no f electron. The impurity concentration dependence of the static spin susceptibility in the present result is in qualitative agreement with the experimental magnetic susceptibility measurements of (Yb,Lu)B 12 .
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References
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10 Magnetic ions Yb3+ have an f hole in Yb-based compounds. Here, however, we refer them as f electrons in the present theoretical model.
11 The g factor for f electrons generally differs from that for conduction electrons. With considering the fact, it is often assumed that the magnetic filed is applied only to f electrons in the theoretical model of the Kondo insulator.[18] In the present study, however, we assume that the magnetic field is applied to both, for simplicity.
12 A.Yoshimori and H.Kasai:Solid State Commun. 58 (1986) 259.
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19 It was pointed out that the careful consideration of the orbital degeneracy and/or the wave vector dependence of the kinetic energy and the hybridization energy themselves is needed to discuss the condition that the hybridization gap opens; seeH.Kuroiwa, Y.Imai, and T.Saso:J. Phys. Soc. Jpn. 76 (2007) 124704.
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25 We have confirmed that there is no serious difference between results obtained by both conditions as long as we restrict ourselves to treat the system near the particle–hole symmetric case and/or for not so large values of U (not shown here).
Subject
Kondo insulator
spin susceptibility
dynamical mean-field theory
Journal Title
Journal of the Physical Society of Japan
Volume
80
Issue
3
ISSN
0031-9015
ISSN(Online)
1347-4073
Published Date
2011-5-15
DOI
Publisher
一般社団法人日本物理学会
Publisher Transcription
イッパン シャダン ホウジン ニホン ブツリ ガッカイ
Publisher Aalternative
The Physical Society of Japan
NII Type
Journal Article
Format
PDF
Rights
当論文の著作権は「一般社団法人日本物理学会(The Physical Society of Japan)が保有している
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著者版
Gyoseki ID
e15467
OAI-PMH Set
Faculty of Science and Engineering
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