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

Research output: Contribution to journalArticle

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 languageEnglish
Article number115123
JournalPhysical Review B
Volume100
Issue number11
DOIs
Publication statusPublished - 2019 Sep 12
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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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), [115123]. https://doi.org/10.1103/PhysRevB.100.115123