Photoinduced valence dynamics in EuNi2(Si0.21Ge0.79)2 studied via time-resolved x-ray absorption spectroscopy

Y. Yokoyama; K. Kawakami; Y. Hirata; K. Takubo; K. Yamamoto; K. Abe; A. Mitsuda; H. Wada; T. Uozumi; S. Yamamoto; I. Matsuda; S. Kimura; K. Mimura; H. Wadati

doi:10.1103/PhysRevB.100.115123

Photoinduced valence dynamics in EuNi2(Si0.21Ge0.79)2 studied via time-resolved x-ray absorption spectroscopy

Y. Yokoyama, K. Kawakami, Y. Hirata, K. Takubo, K. Yamamoto, K. Abe, A. Mitsuda, H. Wada, T. Uozumi, S. Yamamoto, I. Matsuda, S. Kimura, K. Mimura, H. Wadati

Condensed Matter Physics

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

6 Citations (Scopus)

Abstract

The photoinduced valence dynamics of EuNi2(Si0.21Ge0.79)2 were investigated using time-resolved x-ray absorption spectroscopy for Eu M5 edge. Through the pump-probe technique with synchrotron x-ray and Ti:sapphire laser pulses, a photoinduced valence transition was observed from Eu3+ to Eu2+. Because the lifetime of a photoinduced state can be up to 3 ns, a metastable state is considered to be realized. By comparing the experimental results with the theoretical calculations, the photoinduced valence transition between Eu 4f and conduction electrons was quantitatively evaluated.

Original language	English
Article number	115123
Journal	Physical Review B
Volume	100
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.100.115123
Publication status	Published - Sept 12 2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.100.115123

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Yokoyama, Y., Kawakami, K., Hirata, Y., Takubo, K., Yamamoto, K., Abe, K., Mitsuda, A., Wada, H., Uozumi, T., Yamamoto, S., Matsuda, I., Kimura, S., Mimura, K., & Wadati, H. (2019). Photoinduced valence dynamics in EuNi2(Si0.21Ge0.79)2 studied via time-resolved x-ray absorption spectroscopy. Physical Review B, 100(11), Article 115123. https://doi.org/10.1103/PhysRevB.100.115123

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abstract = "The photoinduced valence dynamics of EuNi2(Si0.21Ge0.79)2 were investigated using time-resolved x-ray absorption spectroscopy for Eu M5 edge. Through the pump-probe technique with synchrotron x-ray and Ti:sapphire laser pulses, a photoinduced valence transition was observed from Eu3+ to Eu2+. Because the lifetime of a photoinduced state can be up to 3 ns, a metastable state is considered to be realized. By comparing the experimental results with the theoretical calculations, the photoinduced valence transition between Eu 4f and conduction electrons was quantitatively evaluated.",

author = "Y. Yokoyama and K. Kawakami and Y. Hirata and K. Takubo and K. Yamamoto and K. Abe and A. Mitsuda and H. Wada and T. Uozumi and S. Yamamoto and I. Matsuda and S. Kimura and K. Mimura and H. Wadati",

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doi = "10.1103/PhysRevB.100.115123",

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AU - Yokoyama, Y.

AU - Kawakami, K.

AU - Hirata, Y.

AU - Takubo, K.

AU - Yamamoto, K.

AU - Abe, K.

AU - Mitsuda, A.

AU - Wada, H.

AU - Uozumi, T.

AU - Yamamoto, S.

AU - Matsuda, I.

AU - Kimura, S.

AU - Mimura, K.

AU - Wadati, H.

PY - 2019/9/12

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N2 - The photoinduced valence dynamics of EuNi2(Si0.21Ge0.79)2 were investigated using time-resolved x-ray absorption spectroscopy for Eu M5 edge. Through the pump-probe technique with synchrotron x-ray and Ti:sapphire laser pulses, a photoinduced valence transition was observed from Eu3+ to Eu2+. Because the lifetime of a photoinduced state can be up to 3 ns, a metastable state is considered to be realized. By comparing the experimental results with the theoretical calculations, the photoinduced valence transition between Eu 4f and conduction electrons was quantitatively evaluated.

AB - The photoinduced valence dynamics of EuNi2(Si0.21Ge0.79)2 were investigated using time-resolved x-ray absorption spectroscopy for Eu M5 edge. Through the pump-probe technique with synchrotron x-ray and Ti:sapphire laser pulses, a photoinduced valence transition was observed from Eu3+ to Eu2+. Because the lifetime of a photoinduced state can be up to 3 ns, a metastable state is considered to be realized. By comparing the experimental results with the theoretical calculations, the photoinduced valence transition between Eu 4f and conduction electrons was quantitatively evaluated.

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Photoinduced valence dynamics in EuNi2(Si0.21Ge0.79)2 studied via time-resolved x-ray absorption spectroscopy

Abstract

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