Temperature-dependence of Kondo resonance in CeSi2 studied by bulk-sensitive resonant photoemission

B. H. Choi; R. J. Jung; S. J. Oh; E. J. Cho; T. Iwasaki; A. Sekiyama; S. Imada; S. Suga; T. Muro; Y. S. Kwon

doi:10.1016/j.elspec.2004.02.160

Temperature-dependence of Kondo resonance in CeSi₂ studied by bulk-sensitive resonant photoemission

B. H. Choi, R. J. Jung, S. J. Oh, E. J. Cho, T. Iwasaki, A. Sekiyama, S. Imada, S. Suga, T. Muro, Y. S. Kwon

Department of Physics and Chemistry

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

5 Scopus citations

Abstract

We performed temperature-dependent bulk-sensitive resonant photoemission spectroscopy and Ce M_4,5 X-ray absorption spectroscopy (XAS) of CeSi₂. The XAS data clearly show the increase of the f-level occupancy number n_f as the temperature is raised, which is consistent with the non-crossing approximation calculation in the Kondo scenario. In addition, the bulk-sensitive resonant photoemission of the 4f spectral weights shows that the height of the Kondo resonance at the Fermi level relative to that of the f¹ →f ⁰ emission peak is reduced as the temperature is raised. The Gunnarsson-Schönhammer calculation fit gives generally good agreement with the valence band spectra, and the n_f values derived from the fit shows the same temperature dependence as predicted by the Kondo scenario.

Original language	English
Pages (from-to)	15-20
Number of pages	6
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	136
Issue number	1-2
DOIs	https://doi.org/10.1016/j.elspec.2004.02.160
State	Published - May 2004

Bibliographical note

Funding Information:
This work is supported in part by the Korean Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University. The experiments were performed under the approval of the Japan Synchrotron Radiation Research Institute.

Keywords

Resonant photoemission spectroscopy (RPES)
Single impurity Anderson model (SIAM)

Access to Document

10.1016/j.elspec.2004.02.160

Cite this

@article{c07031dfc1a34d1d86c4809280757e9b,

title = "Temperature-dependence of Kondo resonance in CeSi2 studied by bulk-sensitive resonant photoemission",

abstract = "We performed temperature-dependent bulk-sensitive resonant photoemission spectroscopy and Ce M4,5 X-ray absorption spectroscopy (XAS) of CeSi2. The XAS data clearly show the increase of the f-level occupancy number nf as the temperature is raised, which is consistent with the non-crossing approximation calculation in the Kondo scenario. In addition, the bulk-sensitive resonant photoemission of the 4f spectral weights shows that the height of the Kondo resonance at the Fermi level relative to that of the f1 →f 0 emission peak is reduced as the temperature is raised. The Gunnarsson-Sch{\"o}nhammer calculation fit gives generally good agreement with the valence band spectra, and the nf values derived from the fit shows the same temperature dependence as predicted by the Kondo scenario.",

keywords = "Resonant photoemission spectroscopy (RPES), Single impurity Anderson model (SIAM)",

author = "Choi, {B. H.} and Jung, {R. J.} and Oh, {S. J.} and Cho, {E. J.} and T. Iwasaki and A. Sekiyama and S. Imada and S. Suga and T. Muro and Kwon, {Y. S.}",

note = "Funding Information: This work is supported in part by the Korean Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University. The experiments were performed under the approval of the Japan Synchrotron Radiation Research Institute. ",

year = "2004",

month = may,

doi = "10.1016/j.elspec.2004.02.160",

language = "English",

volume = "136",

pages = "15--20",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Temperature-dependence of Kondo resonance in CeSi2 studied by bulk-sensitive resonant photoemission

AU - Choi, B. H.

AU - Jung, R. J.

AU - Oh, S. J.

AU - Cho, E. J.

AU - Iwasaki, T.

AU - Sekiyama, A.

AU - Imada, S.

AU - Suga, S.

AU - Muro, T.

AU - Kwon, Y. S.

N1 - Funding Information: This work is supported in part by the Korean Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University. The experiments were performed under the approval of the Japan Synchrotron Radiation Research Institute.

PY - 2004/5

Y1 - 2004/5

N2 - We performed temperature-dependent bulk-sensitive resonant photoemission spectroscopy and Ce M4,5 X-ray absorption spectroscopy (XAS) of CeSi2. The XAS data clearly show the increase of the f-level occupancy number nf as the temperature is raised, which is consistent with the non-crossing approximation calculation in the Kondo scenario. In addition, the bulk-sensitive resonant photoemission of the 4f spectral weights shows that the height of the Kondo resonance at the Fermi level relative to that of the f1 →f 0 emission peak is reduced as the temperature is raised. The Gunnarsson-Schönhammer calculation fit gives generally good agreement with the valence band spectra, and the nf values derived from the fit shows the same temperature dependence as predicted by the Kondo scenario.

AB - We performed temperature-dependent bulk-sensitive resonant photoemission spectroscopy and Ce M4,5 X-ray absorption spectroscopy (XAS) of CeSi2. The XAS data clearly show the increase of the f-level occupancy number nf as the temperature is raised, which is consistent with the non-crossing approximation calculation in the Kondo scenario. In addition, the bulk-sensitive resonant photoemission of the 4f spectral weights shows that the height of the Kondo resonance at the Fermi level relative to that of the f1 →f 0 emission peak is reduced as the temperature is raised. The Gunnarsson-Schönhammer calculation fit gives generally good agreement with the valence band spectra, and the nf values derived from the fit shows the same temperature dependence as predicted by the Kondo scenario.

KW - Resonant photoemission spectroscopy (RPES)

KW - Single impurity Anderson model (SIAM)

UR - http://www.scopus.com/inward/record.url?scp=2342510266&partnerID=8YFLogxK

U2 - 10.1016/j.elspec.2004.02.160

DO - 10.1016/j.elspec.2004.02.160

M3 - Article

AN - SCOPUS:2342510266

SN - 0368-2048

VL - 136

SP - 15

EP - 20

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

IS - 1-2

ER -