Soft X-ray photoemission study of CeRhAs and related compounds: Observation of a bulk pseudo-gap

A. Sekiyama; Y. Fujita; M. Tsunekawa; S. Kasai; A. Shigemoto; S. Imada; D. T. Adroja; T. Yoshino; F. Iga; T. Takabatake; T. Nanba; S. Suga

doi:10.1016/j.physb.2005.01.007

Soft X-ray photoemission study of CeRhAs and related compounds: Observation of a bulk pseudo-gap

A. Sekiyama, Y. Fujita, M. Tsunekawa, S. Kasai, A. Shigemoto, S. Imada, D. T. Adroja, T. Yoshino, F. Iga, T. Takabatake, T. Nanba, S. Suga

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

4 Citations (Scopus)

Abstract

We report bulk 4f and non-4f spectral functions near the Fermi level (EF) of a Kondo semiconductor CeRhAs and its related compound CePdSn by virtue of high-resolution soft X-ray photoemission. The non-4f spectrum of CeRhAs measured at 20 K shows a shoulder at the binding energy of ∼0.18eV and almost negligible spectral weight at EF. Although a peak similar to a tail of the Kondo resonance is observed in the 4f spectrum of CeRhAs, the intensity at EF is suppressed compared with those of metallic Ce compounds. These facts are attributed to signatures of the formation of a pseudo-gap in CeRhAs.

Original language	English
Pages (from-to)	115-117
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	359-361
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2005.01.007
Publication status	Published - 30 Apr 2005
Externally published	Yes

Keywords

Bulk-sensitive photoemission
Kondo semiconductor

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2005.01.007

Cite this

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title = "Soft X-ray photoemission study of CeRhAs and related compounds: Observation of a bulk pseudo-gap",

abstract = "We report bulk 4f and non-4f spectral functions near the Fermi level (EF) of a Kondo semiconductor CeRhAs and its related compound CePdSn by virtue of high-resolution soft X-ray photoemission. The non-4f spectrum of CeRhAs measured at 20 K shows a shoulder at the binding energy of ∼0.18eV and almost negligible spectral weight at EF. Although a peak similar to a tail of the Kondo resonance is observed in the 4f spectrum of CeRhAs, the intensity at EF is suppressed compared with those of metallic Ce compounds. These facts are attributed to signatures of the formation of a pseudo-gap in CeRhAs.",

keywords = "Bulk-sensitive photoemission, Kondo semiconductor",

author = "A. Sekiyama and Y. Fujita and M. Tsunekawa and S. Kasai and A. Shigemoto and S. Imada and Adroja, {D. T.} and T. Yoshino and F. Iga and T. Takabatake and T. Nanba and S. Suga",

year = "2005",

month = apr,

day = "30",

doi = "10.1016/j.physb.2005.01.007",

language = "English",

volume = "359-361",

pages = "115--117",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "SPEC. ISS.",

}

TY - JOUR

T1 - Soft X-ray photoemission study of CeRhAs and related compounds

T2 - Observation of a bulk pseudo-gap

AU - Sekiyama, A.

AU - Fujita, Y.

AU - Tsunekawa, M.

AU - Kasai, S.

AU - Shigemoto, A.

AU - Imada, S.

AU - Adroja, D. T.

AU - Yoshino, T.

AU - Iga, F.

AU - Takabatake, T.

AU - Nanba, T.

AU - Suga, S.

PY - 2005/4/30

Y1 - 2005/4/30

N2 - We report bulk 4f and non-4f spectral functions near the Fermi level (EF) of a Kondo semiconductor CeRhAs and its related compound CePdSn by virtue of high-resolution soft X-ray photoemission. The non-4f spectrum of CeRhAs measured at 20 K shows a shoulder at the binding energy of ∼0.18eV and almost negligible spectral weight at EF. Although a peak similar to a tail of the Kondo resonance is observed in the 4f spectrum of CeRhAs, the intensity at EF is suppressed compared with those of metallic Ce compounds. These facts are attributed to signatures of the formation of a pseudo-gap in CeRhAs.

AB - We report bulk 4f and non-4f spectral functions near the Fermi level (EF) of a Kondo semiconductor CeRhAs and its related compound CePdSn by virtue of high-resolution soft X-ray photoemission. The non-4f spectrum of CeRhAs measured at 20 K shows a shoulder at the binding energy of ∼0.18eV and almost negligible spectral weight at EF. Although a peak similar to a tail of the Kondo resonance is observed in the 4f spectrum of CeRhAs, the intensity at EF is suppressed compared with those of metallic Ce compounds. These facts are attributed to signatures of the formation of a pseudo-gap in CeRhAs.

KW - Bulk-sensitive photoemission

KW - Kondo semiconductor

UR - http://www.scopus.com/inward/record.url?scp=18244397925&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2005.01.007

DO - 10.1016/j.physb.2005.01.007

M3 - Article

AN - SCOPUS:18244397925

SN - 0921-4526

VL - 359-361

SP - 115

EP - 117

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - SPEC. ISS.

ER -

Soft X-ray photoemission study of CeRhAs and related compounds: Observation of a bulk pseudo-gap

Abstract

Keywords

ASJC Scopus subject areas

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