The second phase transition in the pyrochlore oxide Cd2Re2O7

TL;DR

This paper reports a second phase transition at 120 K in Cd2Re2O7, revealing complex structural and electronic interplay in this pyrochlore oxide through various measurements.

Contribution

It provides evidence for a new phase transition in Cd2Re2O7 and explores its structural and electronic characteristics, expanding understanding of pyrochlore oxides.

Findings

Identification of a second phase transition at 120 K

Observation of structural and electronic changes

Interplay between crystal and electronic structures

Abstract

Evidence for another phase transition at 120 K in the metallic pyrochlore oxide Cd2Re2O7, following the structural transition at 200 K and followed by the superconducting transition at 1.0 K, is given through resistivity, magnetoresistance, specific heat, and X-ray diffraction measurements. The results indicate unique successive structural and electronic transitions occurring in the pyrochlore compound, revealing an interesting interplay between the crystal and electronic structures on the itinerant electron system in the pyrochlore lattice.