Pyrochlore Oxide Superconductor Cd2Re2O7 Revisited

Zenji Hiroi, Jun ichi Yamaura, Tatsuo C. Kobayashi, Yasuhito Matsubayashi, Daigorou Hirai

Research output: Contribution to journalReview articlepeer-review

36 Citations (Scopus)


The superconducting pyrochlore oxide Cd2Re2O7 is revisited with a particular emphasis on the sample-quality issue. The compound has drawn attention as the only superconductor (Tc = 1.0 K) that has been found in the family of α-pyrochlore oxides since its discovery in 2001. Moreover, it exhibits two characteristic structural transitions from the cubic pyrochlore structure, with the inversion symmetry broken at the first one at 200 K. Recently, it has attracted increasing attention as a candidate spin–orbit coupled metal (SOCM), in which specific Fermi liquid instability is expected to lead to an odd-parity order with spontaneous inversion-symmetry breaking [L. Fu, Phys. Rev. Lett. 115, 026401 (2015)] and parity-mixing superconductivity [V. Kozii and L. Fu, Phys. Rev. Lett. 115, 207002 (2015); Y. Wang et al., Phys. Rev. B 93, 134512 (2016)]. We review our previous experimental results in comparison with those of other groups in the light of the theoretical prediction of the SOCM, which we consider meaningful and helpful for future progress in understanding this unique compound.

Original languageEnglish
Article number024702
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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