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- W3104008757 abstract "Electronic properties of the sodium cobaltate Na x CoO 2 are systematically studied through a precise control of band filling. Resistivity, magnetic susceptibility and specific heat measurements are carried out on a series of high-quality polycrystalline samples prepared at 200 °C with Na content in a wide range of 0.35≤ x ≤0.70. It is found that dramatic changes in electronic properties take place at a critical Na concentration x * that lies between 0.58 and 0.59, which separates a Pauli paramagnetic and a Curie–Weiss metals. It is suggested that at x * the Fermi level touches the bottom of the a 1 g band at the Γ point, leading to a crucial change in the density of states across x * and the emergence of a small electron pocket around the Γ point for x > x * ." @default.
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- W3104008757 date "2007-06-15" @default.
- W3104008757 modified "2023-10-02" @default.
- W3104008757 title "Precise Control of Band Filling in Na<sub><i>x</i></sub>CoO<sub>2</sub>" @default.
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- W3104008757 doi "https://doi.org/10.1143/jpsj.76.063705" @default.
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