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

SRIS - Cross Fertilization Division

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

Abstract

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.

Original language	English
Pages (from-to)	20-23
Number of pages	4
Journal	e-Journal of Surface Science and Nanotechnology
Volume	19
DOIs	https://doi.org/10.1380/EJSSNT.2021.20
Publication status	Published - 2021 Mar 18

Keywords

Boride
Heavy-fermion
Time-resolved photoemission spectroscopy
YbAlB4

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10.1380/EJSSNT.2021.20

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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",

volume = "19",

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journal = "e-Journal of Surface Science and Nanotechnology",

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TY - JOUR

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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M3 - Article

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JO - e-Journal of Surface Science and Nanotechnology

JF - e-Journal of Surface Science and Nanotechnology

ER -

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

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Keywords

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