@article{oai:nagoya.repo.nii.ac.jp:00005511,
 author = {Takeuchi, Tsunehiro and Kondo, Takeshi and Takami, Tsuyoshi and Takahashi, Hirofumi and Ikuta, Hiroshi and Mizutani, Uichiro and Soda, Kazuo and Funahashi, Ryoji and Shikano, Masahiro and Mikami, Masashi and Tsuda, Syunsuke and Yokoya, Takayoshi and Shin, Shik and Muro, Takayuki},
 issue = {12},
 journal = {Physical Review B},
 month = {Mar},
 note = {With a strong help of high-resolution photoemission spectroscopy we demonstrate in this paper that the large thermoelectric power observed in the layered cobalt oxides, such as Ca_3Co_4O_9, Na_0.6CoO_2, and Bi_2Sr_2Co_2O_9, can be well accounted for with the Boltzmann-type metallic electrical conduction. An intense peak with 1.5–2 eV in width was observed in the photoemission spectra with its center at 1.0 eV below the Fermi level E_F in these compounds. The density of states at E_F is finite but negligibly small at room temperature, because E_F is located near the high-energy edge of this narrow band. We calculated thermoelectric power S using the Boltzmann transport equation with the electronic structure near E_F determined by the photoemission measurement. The calculated S shows fairly good consistency with the measured value both in its magnitude and the temperature dependence.},
 pages = {125410--125410},
 title = {Contribution of electronic structure to the large thermoelectric power in layered cobalt oxides},
 volume = {69},
 year = {2004}
}