Electronic structure of black SmS. II. Angle-resolved photoemission spectroscopy

T. Ito; A. Chainani; H. Kumigashira; T. Takahashi; N. K. Sato

Electronic structure of black SmS. II. Angle-resolved photoemission spectroscopy

T. Ito, A. Chainani, H. Kumigashira, T. Takahashi, N. K. Sato

Department of Physics

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

11 Citations (Scopus)

Abstract

We have studied the electronic band structure of semiconducting black SmS with high-resolution angle-resolved photoemission spectroscopy (ARPES). The valence band consists of two well-separated groups of bands: almost nondispersive bands near E_F and highly dispersive bands at higher binding energy. The former is ascribed to the Sm²⁺ (4f⁶→4f⁵) multiplet and the latter to mainly the S 3p states. We found a small but distinct energy dispersion in the Sm 4f-derived bands near E_F. This indicates a strong hybridization between the "localized" Sm 4f electrons and the "itinerant" conduction electrons, leading to the "delocalized" Sm 4f states in mixed-valent SmS. We have compared the present ARPES results with a recent periodic Anderson model calculation.

Original language	English
Article number	155202
Pages (from-to)	1552021-1552024
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	15
Publication status	Published - 2002 Apr 15

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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title = "Electronic structure of black SmS. II. Angle-resolved photoemission spectroscopy",

abstract = "We have studied the electronic band structure of semiconducting black SmS with high-resolution angle-resolved photoemission spectroscopy (ARPES). The valence band consists of two well-separated groups of bands: almost nondispersive bands near EF and highly dispersive bands at higher binding energy. The former is ascribed to the Sm2+ (4f6→4f5) multiplet and the latter to mainly the S 3p states. We found a small but distinct energy dispersion in the Sm 4f-derived bands near EF. This indicates a strong hybridization between the {"}localized{"} Sm 4f electrons and the {"}itinerant{"} conduction electrons, leading to the {"}delocalized{"} Sm 4f states in mixed-valent SmS. We have compared the present ARPES results with a recent periodic Anderson model calculation.",

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T1 - Electronic structure of black SmS. II. Angle-resolved photoemission spectroscopy

AU - Ito, T.

AU - Chainani, A.

AU - Kumigashira, H.

AU - Takahashi, T.

AU - Sato, N. K.

PY - 2002/4/15

Y1 - 2002/4/15

N2 - We have studied the electronic band structure of semiconducting black SmS with high-resolution angle-resolved photoemission spectroscopy (ARPES). The valence band consists of two well-separated groups of bands: almost nondispersive bands near EF and highly dispersive bands at higher binding energy. The former is ascribed to the Sm2+ (4f6→4f5) multiplet and the latter to mainly the S 3p states. We found a small but distinct energy dispersion in the Sm 4f-derived bands near EF. This indicates a strong hybridization between the "localized" Sm 4f electrons and the "itinerant" conduction electrons, leading to the "delocalized" Sm 4f states in mixed-valent SmS. We have compared the present ARPES results with a recent periodic Anderson model calculation.

AB - We have studied the electronic band structure of semiconducting black SmS with high-resolution angle-resolved photoemission spectroscopy (ARPES). The valence band consists of two well-separated groups of bands: almost nondispersive bands near EF and highly dispersive bands at higher binding energy. The former is ascribed to the Sm2+ (4f6→4f5) multiplet and the latter to mainly the S 3p states. We found a small but distinct energy dispersion in the Sm 4f-derived bands near EF. This indicates a strong hybridization between the "localized" Sm 4f electrons and the "itinerant" conduction electrons, leading to the "delocalized" Sm 4f states in mixed-valent SmS. We have compared the present ARPES results with a recent periodic Anderson model calculation.

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Electronic structure of black SmS. II. Angle-resolved photoemission spectroscopy

Abstract

All Science Journal Classification (ASJC) codes

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