Pyrochlore Oxide Superconductor Cd2Re2O7 Revisited

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

Research output: Contribution to journalReview article

11 Citations (Scopus)

Abstract

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
Volume87
Issue number2
DOIs
Publication statusPublished - Jan 1 2018

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broken symmetry
parity
inversions
oxides
Fermi liquids
metals
superconductivity
predictions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Pyrochlore Oxide Superconductor Cd2Re2O7 Revisited. / Hiroi, Zenji; Yamaura, Jun ichi; Kobayashi, Tatsuo; Matsubayashi, Yasuhito; Hirai, Daigorou.

In: Journal of the Physical Society of Japan, Vol. 87, No. 2, 024702, 01.01.2018.

Research output: Contribution to journalReview article

Hiroi, Zenji ; Yamaura, Jun ichi ; Kobayashi, Tatsuo ; Matsubayashi, Yasuhito ; Hirai, Daigorou. / Pyrochlore Oxide Superconductor Cd2Re2O7 Revisited. In: Journal of the Physical Society of Japan. 2018 ; Vol. 87, No. 2.
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