Photoemission study of electronic structure and metal-semiconductor transition in pyrochlore-type Tl2Ru2O7

J. Okamoto, T. Mizokawa, A. Fujimori, T. Takeda, R. Kanno, F. Ishii, T. Oguchi

研究成果: Article

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The electronic structure of pyrochlore-type Tl2Ru2O7, which undergoes a metal-semiconductor transition at Tt∼120 K, has been studied by ultraviolet photoemission spectroscopy (UPS) and inverse-photoemission spectroscopy [bremsstrahlung isochromat spectroscopy (BIS)]. The temperature dependence of the UPS intensity around the Fermi level (EF), which is largely due to the Ru 4d states, reflects the transition. In the BIS spectra, changes occur across the metal-semiconductor transition not only near EF but also several eV above EF where the Ru 4d eg states and the Tl 6s states are dominant. It is therefore concluded that the transport properties across the metal-semiconductor transition in Tl2Ru2O7 are mainly determined by the Ru 4dt2g states around EF but that the changes in the Tl 6s states also make contributions to the transition.

元の言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
69
発行部数3
DOI
出版物ステータスPublished - 2004 1 30
外部発表Yes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

フィンガープリント Photoemission study of electronic structure and metal-semiconductor transition in pyrochlore-type Tl<sub>2</sub>Ru<sub>2</sub>O<sub>7</sub>' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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