Electrical properties of Cd2Re2O7 under pressure

N. Barišić, L. Forró, D. Mandrus, R. Jin, J. He, and P. Fazekas
Phys. Rev. B 67, 245112 – Published 27 June 2003
PDFExport Citation

Abstract

We examine the resistivity and thermopower of single crystal specimens of the pyrochlore oxide Cd2Re2O7 at pressures up to 2 GPa. Thermopower proves to be a sensitive tool in the study of the phase diagram of Cd2Re2O7. The 200 K metal-to-metal phase transition is accompanied by a strong increase of the absolute value of the thermopower. A weaker anomaly allows us to identify a second phase transition at 125 K. Following the temperature dependence of this anomaly, we obtain the corresponding phase boundary up to 1.2 GPa, and argue that it must drop to T=0 before p reaches 1.8 GPa. There is a wide temperature range where the electrical properties are fairly sensitive to pressure, indicating the strong coupling of the electronic degrees of freedom to the lattice.

  • Received 9 December 2002

DOI:https://doi.org/10.1103/PhysRevB.67.245112

©2003 American Physical Society

Authors & Affiliations

N. Barišić1, L. Forró1, D. Mandrus2, R. Jin3, J. He3, and P. Fazekas4,1

  • 1IPMC, Faculté Science de Base, EPFL, CH-1015 Lausanne, Switzerland
  • 2Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA
  • 4Research Institute for Solid State Physics and Optics, Budapest 114, P.O.B. 49, H-1525 Hungary

References (Subscription Required)

Click to Expand
Issue

Vol. 67, Iss. 24 — 15 June 2003

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×