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ID 49394
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language
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
Text Version
著者版
Gyoseki ID
e15467
OAI-PMH Set
Faculty of Science and Engineering