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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number054704
Journaljournal of the physical society of japan
Volume82
Issue number5
DOIs
Publication statusPublished - 2013 May 1

Keywords

  • Cerusi
  • Heavy fermion
  • Metamagnetism
  • Pseudo-metamagnetism
  • Thermoelectric power

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Magnetic field driven electronic singularities through metamagnetic phenomena: Case of the heavy fermion antiferromagnet Ce(Ru<sub>0.92</sub>Rh <sub>0.08</sub>)<sub>2</sub>Si<sub>2</sub>'. Together they form a unique fingerprint.

Cite this