Distributed hybridization model for quantum critical behavior in magnetic quasicrystals

Junya Otsuki, Hiroaki Kusunose

研究成果: Article

8 引用 (Scopus)

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A quantum critical behavior of the magnetic susceptibility was observed in a quasicrystal containing ytterbium. At the same time, a mixed-valence feature of Yb ions was reported, which appears to be incompatible with the magnetic instability. We derive the magnetic susceptibility by expressing the quasiperiodicity as the distributed hybridization strength between Yb 4f and conduction electrons. Assuming a wide distribution of the hybridization strength, the most f electrons behave as renormalized paramagnetic states in the Kondo or mixed-valence regime, but a small number of f moments remain unscreened. As a result, the bulk magnetic susceptibility exhibits a nontrivial power-law-like behavior, while the average f-electron occupation is that of mixed-valence systems. This model thus resolves two contradictory properties of Yb quasicrystals.

元の言語English
記事番号073712
ジャーナルjournal of the physical society of japan
85
発行部数7
DOI
出版物ステータスPublished - 2016 7 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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