Valence-Fluctuation and Non-Fermi-Liquid Behaviors in Yb-Based Quasicrystals/Approximant Crystals and SmS

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  • IMURA Keiichiro
    Graduate School of Science, Nagoya University
  • SATO Noriaki
    Graduate School of Science, Nagoya University Center for General Education, Aichi Institute of Technology

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  • Yb系準結晶・近似結晶とSmSにおける価数揺動と非フェルミ液体挙動
  • Ybケイ ジュンケッショウ ・ キンジ ケッショウ ト SmS ニ オケル カスウヨウドウ ト ヒフェルミ エキタイ キョドウ

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Abstract

<p>In this article, we review the recent progress in our understanding of electronic states in SmS, Yb-based quasicrystals and approximants, which exhibit valence-fluctuations. Results of partial-fluorescence-yield X-ray absorption spectroscopy experiments are presented. We also present the intriguing relationship between the rare-earth meanvalence and the thermodynamic properties, with an emphasis on the discussion of the possible origin of the unconventional quantum critical behavior in the Yb-based quasicrystals.</p>

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