Evolution of electronic states in the Kondo alloy system

T. Susaki; T. Konishi; A. Sekiyama; T. Mizokawa; A. Fujimori; T. Iwasaki; S. Ueda; T. Matsushita; S. Suga

doi:10.1103/PhysRevB.56.13727

Evolution of electronic states in the Kondo alloy system

T. Susaki, T. Konishi, A. Sekiyama, T. Mizokawa, A. Fujimori, T. Iwasaki, S. Ueda, T. Matsushita, S. Suga

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

We have studied the effect of Lu substitution on the Kondo insulator (Formula presented) by high-resolution photoemission. Comparison of the spectra of (Formula presented), (Formula presented), and (Formula presented) reveals that the density of states (DOS) of the B (Formula presented)-derived conduction band near the Fermi level is reduced in (Formula presented) over a rather wide (∼ 40 meV) energy region. Lu substitution (i) recovers the reduced B (Formula presented) DOS, (ii) shifts the Yb (Formula presented)-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 (Formula presented) ions mediated by the Yb (Formula presented)-B (Formula presented) hybridization in (Formula presented).

Original language	English
Pages (from-to)	13727-13730
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	56
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.56.13727
Publication status	Published - 1997

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Evolution of electronic states in the Kondo alloy system",

abstract = "We have studied the effect of Lu substitution on the Kondo insulator (Formula presented) by high-resolution photoemission. Comparison of the spectra of (Formula presented), (Formula presented), and (Formula presented) reveals that the density of states (DOS) of the B (Formula presented)-derived conduction band near the Fermi level is reduced in (Formula presented) over a rather wide (∼ 40 meV) energy region. Lu substitution (i) recovers the reduced B (Formula presented) DOS, (ii) shifts the Yb (Formula presented)-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 (Formula presented) ions mediated by the Yb (Formula presented)-B (Formula presented) hybridization in (Formula presented).",

author = "T. Susaki and T. Konishi and A. Sekiyama and T. Mizokawa and A. Fujimori and T. Iwasaki and S. Ueda and T. Matsushita and S. Suga",

year = "1997",

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T1 - Evolution of electronic states in the Kondo alloy system

AU - Susaki, T.

AU - Konishi, T.

AU - Sekiyama, A.

AU - Mizokawa, T.

AU - Fujimori, A.

AU - Iwasaki, T.

AU - Ueda, S.

AU - Matsushita, T.

AU - Suga, S.

PY - 1997

Y1 - 1997

N2 - We have studied the effect of Lu substitution on the Kondo insulator (Formula presented) by high-resolution photoemission. Comparison of the spectra of (Formula presented), (Formula presented), and (Formula presented) reveals that the density of states (DOS) of the B (Formula presented)-derived conduction band near the Fermi level is reduced in (Formula presented) over a rather wide (∼ 40 meV) energy region. Lu substitution (i) recovers the reduced B (Formula presented) DOS, (ii) shifts the Yb (Formula presented)-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 (Formula presented) ions mediated by the Yb (Formula presented)-B (Formula presented) hybridization in (Formula presented).

AB - We have studied the effect of Lu substitution on the Kondo insulator (Formula presented) by high-resolution photoemission. Comparison of the spectra of (Formula presented), (Formula presented), and (Formula presented) reveals that the density of states (DOS) of the B (Formula presented)-derived conduction band near the Fermi level is reduced in (Formula presented) over a rather wide (∼ 40 meV) energy region. Lu substitution (i) recovers the reduced B (Formula presented) DOS, (ii) shifts the Yb (Formula presented)-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 (Formula presented) ions mediated by the Yb (Formula presented)-B (Formula presented) hybridization in (Formula presented).

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