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.
| 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 |
| Publication status | Published - 1997 Dec 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Evolution of electronic states in the Kondo alloy system Yb1-xLuxB12. / Susaki, T.; Konishi, T.; Sekiyama, A.; Mizokawa, Takashi; Fujimori, A.; Iwasaki, T.; Ueda, S.; Matsushita, T.; Suga, S.; Ishii, H.; Iga, F.; Kasaya, M.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 56, No. 21, 01.12.1997, p. 13727-13730.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Evolution of electronic states in the Kondo alloy system Yb1-xLuxB12
AU - Susaki, T.
AU - Konishi, T.
AU - Sekiyama, A.
AU - Mizokawa, Takashi
AU - Fujimori, A.
AU - Iwasaki, T.
AU - Ueda, S.
AU - Matsushita, T.
AU - Suga, S.
AU - Ishii, H.
AU - Iga, F.
AU - Kasaya, M.
PY - 1997/12/1
Y1 - 1997/12/1
N2 - 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.
AB - 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.
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M3 - Article
AN - SCOPUS:0006259743
VL - 56
SP - 13727
EP - 13730
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 21
ER -