Magnetic field driven electronic singularities through metamagnetic phenomena: Case of the heavy fermion antiferromagnet Ce(Ru0.92Rh 0.08)2Si2

Yo Machida, Koichi Izawa, Dai Aoki, Georg Knebel, Alexandre Pourret, Jacques Flouquet

研究成果: ジャーナルへの寄稿学術論文査読

4 被引用数 (Scopus)

抄録

Thermoelectric power measurements on the heavy fermion antiferromagnet Ce(Ru0.92Rh0.08)2Si2 under magnetic field (H) show clearly that the antiferromagnetic state below the critical field Hc ∼ 2:8 T can be fully decoupled from the pseudo-metamagnetic crossover at Hm ∼ 5:8 T which occurs when the magnetization reaches a critical value. By contrast to the weak field variation of the Sommerfeld coefficient of the specific heat in the field window from Hc to Hm, two electronic singularities with opposite signs are detected in the thermoelectric power. The interplay between the magnetic instability and the topological change of the Fermi surface is discussed and we argue similarities to other field instabilities in various heavy fermion compounds.

本文言語英語
論文番号054704
ジャーナルJournal of the Physical Society of Japan
82
5
DOI
出版ステータス出版済み - 2013 5月

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