Structural and electronic properties of pyrochlore-type A 2Re2O7 (A=Ca, Cd, and Pb)

Kenya Ohgushi, Jun Ichi Yamaura, Masaki Ichihara, Yoko Kiuchi, Takashi Tayama, Toshiro Sakakibara, Hirotada Gotou, Takehiko Yagi, Yutaka Ueda

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21 Citations (Scopus)


Cd2Re2O7 exhibits a unique structural transition characterized by a loss of the inversion symmetry in a metal. Here, we report on structural and electronic properties for A2Re 2O7 (A=Ca and Pb), and S-substituted Cd2Re 2O7. On the basis of material characteristics, we show that the covalency of particular bonds stabilizes the low-temperature phase without the inversion symmetry. We also observed an incoherent charge transport with a weakly temperature-dependent resistivity on the verge of structural transition. This phenomenon is argued in terms of the polaron formation.

Original languageEnglish
Article number125103
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
Publication statusPublished - 2011 Mar 14


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