High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7

Yasuhito Matsubayashi; Takumi Hasegawa; Norio Ogita; Jun-ichi Yamaura; Zenji Hiroi

doi:10.1016/j.physb.2017.10.030

High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7

Strongly Correlated Electrons 2018-04-30 v1

Authors: Yasuhito Matsubayashi , Takumi Hasegawa , Norio Ogita , Jun-ichi Yamaura , Zenji Hiroi

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Abstract

The superconducting pyrochlore oxide Cd2Re2O7 (Tc = 1 K), which is now considered as a candidate of the spin-orbit-coupled metal, shows an inversion-symmetry-breaking structural transition at Ts1 = 200 K. Ts1 decreases with increasing pressure and disappears at around Pc = 4:2GPa, where at least four high-pressure phases with tiny structural distortions are suggested by means of powder X-ray diffraction [Yamaura PRB 2017]. We have carried out Raman scattering experiments to investigate changes in the crystal symmetry under high pressures up to 4.8 GPa. A structural transition at 1.9-3.0 GPa and the recovery of inversion symmetry above Pc are observed at 12 K.

Keywords

high-pressure phase transitions phase transitions hydrogen storage and hydrides

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@article{arxiv.1804.10487,
  title  = {High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7},
  author = {Yasuhito Matsubayashi and Takumi Hasegawa and Norio Ogita and Jun-ichi Yamaura and Zenji Hiroi},
  journal= {arXiv preprint arXiv:1804.10487},
  year   = {2018}
}

High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7

Abstract

Keywords

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