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402 results on '"Umemura, Tomonari"'

12. Electric field modulation of thermopower for transparent amorphous oxide thin film transistors

Author

Koide, Hirotaka, Nagao, Yuki, Koumoto, Kunihito, Takasaki, Yuka, Umemura, Tomonari, Kato, Takeharu, Ikuhara, Yuichi, and Ohta, Hiromichi

Subjects
Condensed Matter - Materials Science
Abstract

To clarify the electronic density of states (DOS) around the conduction band bottom for state of the art transparent amorphous oxide semiconductors (TAOSs), InGaZnO4 and In2MgO4, we fabricated TAOS-based transparent thin film transistors (TTFTs) and measured their gate voltage dependence of thermopower (S). TAOS-based TTFTs exhibit an unusual S behavior. The |S|-value abruptly increases, but then gradually decreases as Vg increases, clearly suggesting the anti-parabolic shaped DOS is hybridized with the original parabolic shaped DOS around the conduction band bottom., Comment: 10 pages, 4 figures

Published
2010
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42. Determination and Speciation of Aluminum in Environmental Samples by Cation Exchange High-Performance Liquid Chromatography with High Resolution ICP-MS Detection

Author

Tsunoda, Kin-Ichi, Umemura, Tomonari, Ohshima, Kazumasa, Aizawa, Sho-Ichi, Yoshimura, Etsuro, Satake, Ken-Ichi, Satake, Kenichi, editor, Shindo, Junko, editor, Takamatsu, Takejiro, editor, Nakano, Takanori, editor, Aoki, Shigeru, editor, Fukuyama, Tsutomu, editor, Hatakeyama, Shiro, editor, Ikuta, Kazukamasa, editor, Kawashima, Munetsugu, editor, Kohno, Yoshihisa, editor, Kojima, Satoru, editor, Murano, Kentaro, editor, Okita, Toshiichi, editor, Taoda, Hiroshi, editor, Tsunoda, Kinichi, editor, and Tsurumi, Makoto, editor

Published
2001
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