Mechanism for glueball production

Polycrystalline samples of a 3d-transition-metal oxide NaxCoO,., (~~0 . 5 ) system have been synthesized using a standard solid-state reaction method, and the thermoelectric properties have been measured. Although it has been, in general, believed that oxides are not suitable for thermoelectric materials, NaxCo0,.6 system shows a good thermoelectric performance, i.e. a high electrical conductivity, a large thermoelectric power and a low thermal conductivity in a wide temperature range from room temperature to 1073 K. The unexpected large thermoelectric power is likely to come from a strong electronelectron correlation.In this study, we have tried to partially substitute alkali-metal, alkaline-earth metal, transition-metal, and rare-earth element for Na or CO site in order to investigate the transport properties of NaxCoO,,. Due to the alkaline-earth-metal-doping, the thermoelectric power was enhanced while the conductivity was reduced. This indicates that the effective carriers are electron holes. On the other hand, the Ag-doping improves both the conductivity and the thermoelectric power, suggesting that the transport properties of NaxCoO,.p are not classical metallic behavior.

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Mechanism for glueball production

Cited by 3 publications

References 18 publications

Gluonium content in ? and ?? mesons fromJ/? decays

Gluonium content in ? and ?? mesons fromJ/? decays

Comment on "φ-Meson Production as a Probe of the Quark-Gluon Plasma"

Thermoelectric properties of Na/sub x/CoO/sub 2-δ/ (x≅0.5) system; focusing on partially substituting effects

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