Electronic nature of layered oxysulfide Sr2-xCa xCu2CoO2S2 with CoO2 planes

K. Ito, T. Endo, T. Kubodera, Y. Kamihara, M. Matoba, H. Kitô

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We have studied the electronic nature of the layered oxysulfide Sr2-x Cax Cu2 CoO2 S2 which has strongly correlated CoO2 square planes. These materials exhibit narrow-gap semiconducting behavior and the conduction mechanism depends on the temperature. Valence band x-ray photoemission spectroscopy spectra show that Ca doping and the production of Sr defects cause the generation of a quasiparticle band near the Fermi level. These phenomena suggest that the materials are changing from correlated semiconductors to bad metals.

本文言語English
論文番号08F705
ジャーナルJournal of Applied Physics
99
8
DOI
出版ステータスPublished - 2006

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「Electronic nature of layered oxysulfide Sr<sub>2-x</sub>Ca <sub>x</sub>Cu<sub>2</sub>CoO<sub>2</sub>S<sub>2</sub> with CoO<sub>2</sub> planes」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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