Competition and/or coexistence of antiferromagnetism and superconductivity in CeRhIn5 and CeCoIn5

Georg Knebel, Dai Aoki, Jean Pascal Brison, Ludovic Howald, Gerard Lapertot, Justin Panarin, Stephane Raymond, Jacques Flouquet

研究成果: Article査読

21 被引用数 (Scopus)

抄録

The Ce compounds CeCoIn5 and CeRhIn5 are ideal model systems to study the competition of antiferromagnetism (AF) and superconductivity (SC). Here we discuss the pressure-temperature and magnetic field phase diagrams of both compounds. In CeRhIn5 the interesting observation is that in zero magnetic field a coexistence AF+SC phase exist inside the AF phase below the critical pressure pc * ≈ 2 GPa. Above pc * AF is suppressed in zero field but can be re-induced by applying a magnetic field. The collapse of AF under pressure coincides with the abrupt change of the Fermi surface. In CeCoIn5 a new phase appears at low temperatures and high magnetic field (LTHF) which vanishes at the upper critical field Hc2. In both compounds the paramagnetic pair breaking effect dominates at low temperature. We discuss the evolution of the upper critical field under high pressure of both compounds and propose a simple picture of the glue of reentrant magnetism to the upper critical field in order to explain the interplay of antiferromagnetic order and SC.

本文言語English
ページ(範囲)557-562
ページ数6
ジャーナルPhysica Status Solidi (B) Basic Research
247
3
DOI
出版ステータスPublished - 2010 3
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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