Order-disorder-order phase transitions in the pyrochlore superconductor Cd2Re2O7
Journal article, 2005

The structural phase transitions of the pyrochlore superconductor Cd2Re2O7 are investigated by Raman light scattering. The cubic to tetragonal transition at 200 K is characterized by the appearance of a broad mode originating from oxygen ion motion in agreement with recent theoretical predictions [I. A. Sergienko , Phys. Rev. Lett. 92, 065501 (2004)]. The appearance of well-defined low-frequency modes at the 120-K transition indicates that it is driven by ordering of the Cd ions within the channel voids of the distorted pyrochlore.

Author

Christopher Knee

Chalmers, Applied Physics

Joakim Holmlund

Chalmers, Applied Physics, Condensed Matter Physics

Jakob Andreasson

Chalmers, Applied Physics, Condensed Matter Physics

Mikael Käll

Chalmers, Applied Physics, Condensed Matter Physics

Sten Eriksson

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Lars Börjesson

Chalmers, Applied Physics, Condensed Matter Physics

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 71

Subject Categories

Environmental Sciences

DOI

10.1103/PhysRevB.71.214518

More information

Created

10/8/2017