Correlations and Semimetallic Behaviors in Pyrochlore Oxide Cd2Re2O7

Z. Hiroi; M. Hanawa; Y. Muraoka; H. Harima

doi:10.1143/JPSJ.72.21

Correlations and Semimetallic Behaviors in Pyrochlore Oxide Cd2Re2O7

Strongly Correlated Electrons 2009-11-07 v1 Materials Science

Authors: Z. Hiroi , M. Hanawa , Y. Muraoka , H. Harima

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Abstract

Electronic properties of the metallic pyrochlore oxide Cd2Re2O7 are studied by means of electrical resistivity and Hall measurements. Semimetallic band structures are revealed as expected from band structure calculations. It is found that large changes in carrier density and mass occur at the structural phase transition at Ts1 = 200 K. A large mass enhancement is observed, particularly for the high-temperature phase with the ideal pyrochlore structure, suggesting that an anomalous correlation has an important effect on the itinerant electrons in the pyrochlore lattice.

Keywords

electronic structure phase transitions electronic structure of materials

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@article{arxiv.cond-mat/0211517,
  title  = {Correlations and Semimetallic Behaviors in Pyrochlore Oxide Cd2Re2O7},
  author = {Z. Hiroi and M. Hanawa and Y. Muraoka and H. Harima},
  journal= {arXiv preprint arXiv:cond-mat/0211517},
  year   = {2009}
}

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4 pages, 4 figures, J. Phys. Soc. Jpn., in press

Correlations and Semimetallic Behaviors in Pyrochlore Oxide Cd2Re2O7

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