High-Pressure Study on the Superconducting Pyrochlore Oxide Cd 2Re2O7

Zenji Hiroi, Touru Yamauchi, Takahiro Yamada, Masafumi Hanawa, Yasuo Ohishi, Osamu Shimomura, Melike Abliz, Masato Hedo, Yoshiya Uwatoko

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Superconducting and structural phase transitions in a pyrochlore oxide Cd2Re2O7 are studied under high pressure by x-ray diffraction and electrical resistivity measurements. A rich P-T phase diagram is obtained, which contains at least two phases with the ideal and slightly distorted pyrochlore structures. It is found that the transition between them is suppressed with increasing pressure and finally disappears at a critical pressure Pc = 3.5 GPa. Remarkable enhancements in the residual resistivity as well as the coefficient A of the AT2 term in the resistivity are found around the critical pressure. Superconductivity is detected only for the phase with the structural distortion.

Original languageEnglish
Pages (from-to)1553-1557
Number of pages5
Journaljournal of the physical society of japan
Volume71
Issue number6
DOIs
Publication statusPublished - 2002 Jun

Keywords

  • CdReO
  • Electrical resistivity
  • High pressure
  • Phase transition
  • Pyrochlore oxide
  • Superconductivity
  • X-ray diffraction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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