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斎藤 祐児; 藤原 秀紀*; 保井 晃*; 門野 利治*; 菅原 仁*; 菊地 大輔*; 佐藤 英行*; 菅 滋正*; 山崎 篤志*; 関山 明*; et al.
Physical Review B, 102(16), p.165152_1 - 165152_8, 2020/10
被引用回数:1 パーセンタイル:4.48(Materials Science, Multidisciplinary)Through a high-precision soft X-ray magnetic circular dichroism (XMCD) study of the intermediate-valence compound SmOsSb
, we show our successful approach of revealing unprecedented details of Kondo screening below a characteristic temperature of
20 K in the paramagnetic phase. The multiplet XMCD structure at the Sm
edge sensitive to the 4
configuration enabled us to observe a clear difference between the temperature evolution above and below
with one- and two-component behavior, respectively. Our findings are in strong contrast to the conventional Kondo crossover that coincides with the valence transition, but are qualitatively accounted for by theoretical XMCD predictions combined with the two-fluid phenomenology recently proposed. This work contributes to the large context of Kondo physics that is closely related to quantum criticality in heavy fermion systems.