Valence fluctuations in Yb(Al,Fe)B4 studied by nanosecond-time-resolved photoemission spectroscopy using synchrotron radiation

M. Okawa; K. Akikubo; S. Yamamoto; I. Matsuda; T. Saitoh

doi:10.1380/EJSSNT.2021.20

Valence fluctuations in Yb(Al,Fe)B₄ studied by nanosecond-time-resolved photoemission spectroscopy using synchrotron radiation

M. Okawa, K. Akikubo, S. Yamamoto, I. Matsuda, T. Saitoh^*

^*この研究の対応する著者

研究成果: Article › 査読

抄録

Temporal variations of valence states of the α-YbAl_1−xFe_xB₄ crystals (x = 0, 0.013, and 0.098) are experimentally examined in a nanosecond time-scale by time-resolved photoemission experiments using synchrotron radiation. The Yb 4f spectral features show no apparent change with time during relaxations after the optical pumping. The present experimental result indicates that dynamics of valence fluctuations in the material are likely dominated by a picosecond or much faster time-scale. The time-resolved measurement at the time-resolution limit at synchrotron radiation captured the trace of valence fluctuations.

本文言語	English
ページ（範囲）	20-23
ページ数	4
ジャーナル	e-Journal of Surface Science and Nanotechnology
巻	19
DOI	https://doi.org/10.1380/EJSSNT.2021.20
出版ステータス	Published - 2021 3月 18
外部発表	はい

ASJC Scopus subject areas

バイオテクノロジー
バイオエンジニアリング
凝縮系物理学
材料力学
表面および界面
表面、皮膜および薄膜

文献へのアクセス

10.1380/EJSSNT.2021.20

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引用スタイル

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title = "Valence fluctuations in Yb(Al,Fe)B4 studied by nanosecond-time-resolved photoemission spectroscopy using synchrotron radiation",

abstract = "Temporal variations of valence states of the α-YbAl1−xFexB4 crystals (x = 0, 0.013, and 0.098) are experimentally examined in a nanosecond time-scale by time-resolved photoemission experiments using synchrotron radiation. The Yb 4f spectral features show no apparent change with time during relaxations after the optical pumping. The present experimental result indicates that dynamics of valence fluctuations in the material are likely dominated by a picosecond or much faster time-scale. The time-resolved measurement at the time-resolution limit at synchrotron radiation captured the trace of valence fluctuations.",

keywords = "Boride, Heavy-fermion, Time-resolved photoemission spectroscopy, YbAlB4",

author = "M. Okawa and K. Akikubo and S. Yamamoto and I. Matsuda and T. Saitoh",

year = "2021",

month = mar,

day = "18",

doi = "10.1380/EJSSNT.2021.20",

language = "English",

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T1 - Valence fluctuations in Yb(Al,Fe)B4 studied by nanosecond-time-resolved photoemission spectroscopy using synchrotron radiation

AU - Okawa, M.

AU - Akikubo, K.

AU - Yamamoto, S.

AU - Matsuda, I.

AU - Saitoh, T.

PY - 2021/3/18

Y1 - 2021/3/18

N2 - Temporal variations of valence states of the α-YbAl1−xFexB4 crystals (x = 0, 0.013, and 0.098) are experimentally examined in a nanosecond time-scale by time-resolved photoemission experiments using synchrotron radiation. The Yb 4f spectral features show no apparent change with time during relaxations after the optical pumping. The present experimental result indicates that dynamics of valence fluctuations in the material are likely dominated by a picosecond or much faster time-scale. The time-resolved measurement at the time-resolution limit at synchrotron radiation captured the trace of valence fluctuations.

AB - Temporal variations of valence states of the α-YbAl1−xFexB4 crystals (x = 0, 0.013, and 0.098) are experimentally examined in a nanosecond time-scale by time-resolved photoemission experiments using synchrotron radiation. The Yb 4f spectral features show no apparent change with time during relaxations after the optical pumping. The present experimental result indicates that dynamics of valence fluctuations in the material are likely dominated by a picosecond or much faster time-scale. The time-resolved measurement at the time-resolution limit at synchrotron radiation captured the trace of valence fluctuations.

KW - Boride

KW - Heavy-fermion

KW - Time-resolved photoemission spectroscopy

KW - YbAlB4

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