Transport Properties and Electronic States in the Layered Thermoelectric Rhodate (Bi_<1-x>Pb_x)_<1.8>Ba_2Rh_<1.9>O_y(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Resistivity, thermopower and Hall coefficient have been systematically measured for polycrystalline samples of (Bi_<1-x>Pb_x)_<1.8>Ba_2Rh_<1.9>O_y. An upturn of the resistivity and the Hall coefficient below 50 K is ascribed to decrease in the density of states due to a pseudogap formation. The thermopower and Hall coefficient are nearly identical to those of the thermoelectric oxide Bi_2Sr_2Co_2O_y. This suggests a nearly identical density of states between the two oxides, which is also verified from a first-principle calculation, where a broader 4d orbital and a larger rhodium-rhodium distance along the in-plane direction accidentally give nearly the same density of states as those of the layered cobalt oxides.
- 社団法人日本物理学会の論文
- 2005-05-15
著者
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OKABE Hirotaka
Department of Physics and Mathematics, Aoyama Gakuin University
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OKADA Satoshi
Department of Molecular and Pharmacological Neuroscience, Graduate School of Biomedical Sciences, Hi
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TERASAKI Ichiro
Department of Applied Physics, Waseda University
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Terasaki Ichiro
Department Of Applied Physics Waseda University:crest Japan Science And Technology Agency
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Terasaki Ichiro
Department Of Applied Physics The University Of Tokyo
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MATOBA Masanori
Department of Applied Physics and Physico-Informatics, Keio University
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Matoba Masanori
Department Of Applied Physics And Physico-informatics Keio University
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Okabe Hirotaka
Department Of Applied Physics And Physico-informatics Keio University
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Matoba Masanori
Department Of Applied Physics And Physico-informatics Faculty Of Science And Technology Keio Univers
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Okada Satoshi
Department Of Applied Physics Waseda University:crest Japan Science And Technology Agency:(present A
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Okada Satoshi
Department Of Applied Chemistry And Biotechnology University Of Fukui
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