- 著者
- Onoda Masashige Kikuchi Yuji
- 出版者
- IOP Publishing
- 雑誌
- Journal of physics. Condensed matter (ISSN:09538984)
- 巻号頁・発行日
- vol.19, no.34, pp.346206, 2007-08
- 被引用文献数
- 5
A new type of the triangular lattice system HxCoO2 (x ≈ 0.3)is synthesized through a chemical extraction of Na from Na0.3CoO2 withH2SO4. The structure is modelled by two oxygen layers with a prismaticoxygen environment and a symmetric linear H−O bond on the basis of the xraypowder diffraction and magic-angle spinning NMR analyses. Measurementsof the electrical resistivity, thermoelectric power and magnetic susceptibilitysuggest a weakly correlated metallic state with the enhancement of effective mass.The transport anomalies, accompanied with the rapid decrease of thermoelectricpower, are observed at about 10 K.