Pressure-induced novel superconductivity and heavy fermion state in rare earth compounds

Fuminori Honda, Yusuke Hirose, Shingo Yoshiuchi, Shinichi Yasui, Tetsuya Takeuchi, Ismardo Bonalde, Katsuya Shimizu, Rikio Settai, Yoshichika Onuki

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

We have carried out the electrical resistivity measurements under high pressures up to 24 GPa for CeTX3 (T: Co and Ir, X: Si and Ge), CePd5Al2 and YbIr2Zn20 in order to investigate quantum criticality and superconductivity. Antiferromagnets CeTX3 with the non-centrosymmetric tetragonal structure show superconductivity under high pressures and reveal a huge upper critical field for H∥ [001]. An antiferromagnet CePd5Al2, which is an isostructural family of a heavy fermion superconductor NpPd5Al 2, also shows superconductivity under high pressures. In these compounds, superconductivity appears in the vicinity of quantum critical point. On the other hand, YbIr2Zn20 without magnetic ordering approaches to the quantum critical point with increasing pressure and exhibits a super-heavy fermion state exceeding 10 J/(K2· mol).

Original languageEnglish
Article number022028
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 2
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
Duration: Aug 10 2011Aug 17 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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