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We propose a surface potential-based polycrystalline silicon thin-film transistors (poly-Si TFTs) compact model considering a nonequilibrium state. A drain current model considers grain boundary (GB) trap-related physical phenomena: composite mobility of GB and intragrain, GB bias-induced mobility modulation, transient behavior because of carrier capture and emission at GBs, pinch off voltage lowering, and GB trap-assisted leakage current. Besides, photoinduced current behavior is also considered by introducing quasi-Fermi potential. A capacitance model is derived from physically partitioned terminal charges and coupled to the drain current. This compact model allows us to accurately simulate static characteristics of various types of poly-Si TFTs, including temperature and luminance dependence. Furthermore, it succeeded to simulate frequency dependence of circuit performance derived from the trap-related transient behavior, which was verified by evaluating delay time in a 21-stage inverter chain.

2013-11-20 08:31:42
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1 0 0 0 OA Hard x-ray photoelectron spectroscopy study on valence band structure of semiconducting BaSi2

著者: Baba Masakazu Ito Keita Du Weijie Sanai Tatsunori Okamoto Kazuaki Toko Kaoru Ueda Shigenori Imai Yoji Kimura Akio Suemasu Takashi
出版者: American Institute of Physics
雑誌: Journal of applied physics (ISSN:00218979)
巻号頁・発行日: vol.114, no.12, pp.123702, 2013-09
被引用文献数: 15

The valence band structures of a 35-nm-thick BaSi2 epitaxial film on Si(111) have been explored at room temperature by hard x-ray photoelectron spectroscopy (HAXPES). The experimentally obtained photoelectron spectrum is well reproduced by first-principles calculations based on the pseudopotential method. The top of the valence band consists mainly of Si 3s and 3p states in BaSi2, suggesting that the effective mass of holes is small in BaSi2. This is favorable from the viewpoint of solar cell applications. The observed spectrum shifted slightly to the lower energy side due to n-type conductivity of BaSi2. The valence band top was observed at about 0.8 eV below the Fermi level in the HAXPES spectrum.

2013-11-20 08:31:37
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1 0 0 0 OA 話し合い指導における視覚情報化ツールの活用

著者: 長田友紀

2013

2013-11-20 08:31:32
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http://hdl.handle.net/2241/120082

1 0 0 0 OA 特集1 : 研究解説 : 電気化学バイオセンサーの機能デザイン

著者: 立間徹渡辺正
出版者: 東京大学生産技術研究所
雑誌: 生産研究 (ISSN:0037105X)
巻号頁・発行日: vol.42, no.11, pp.609-616, 1990-11-01

小特集バイオテクノロジー

2013-11-20 08:00:57
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http://hdl.handle.net/2261/43483

1 0 0 0 OA 制度化と制度改革のゲーム論的分析

著者: 町野和夫
出版者: 北海道大学經濟學部 = HOKKAIDO UNIVERSITY SAPPORO,JAPAN
雑誌: 經濟學研究 (ISSN:04516265)
巻号頁・発行日: vol.51, no.1, pp.57-69, 2001-06

2013-11-19 13:02:12
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http://hdl.handle.net/2115/32222

1 0 0 0 OA Absence of embedded eigenvalues for Riemannian Laplacians

著者: Ito K. Skibsted E.
出版者: Elsevier Inc.
雑誌: Advances in mathematics (ISSN:00018708)
巻号頁・発行日: vol.248, pp.945-962, 2013-11
被引用文献数: 8 10

In this paper we study absence of embedded eigenvalues for Schrödinger operators on non-compact connected Riemannian manifolds. A principal example is given by a manifold with an end (possibly more than one) in which geodesic coordinates are naturally defined. In this case one of our geometric conditions is a positive lower bound of the second fundamental form of angular submanifolds at infinity inside the end. Another condition is an upper bound of the trace of this quantity, while a third one is a bound of the derivatives of part of the trace (some oscillatory behaviour of the trace is allowed). In addition to geometric bounds we need conditions on the potential, a regularity property of the domain of the Schrödinger operator and the unique continuation property. Examples include ends endowed with asymptotic Euclidean or hyperbolic metrics.

2013-11-19 08:32:03
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1 0 0 0 OA Numerical Simulation on the Urban Warming Induced by Land Use Modification during Recent 30 Years

著者: 青栁曉典

2013

2013-11-19 08:31:57
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http://hdl.handle.net/2241/120073

1 0 0 0 OA Multiloop amplitudes of light-cone gauge bosonic string field theory in noncritical dimensions

著者: Ishibashi Nobuyuki Murakami Koichi
出版者: Springer
雑誌: Journal of high energy physics (ISSN:10298479)
巻号頁・発行日: vol.2013, no.9, pp.53, 2013-09
被引用文献数: 9

We study the multiloop amplitudes of the light-cone gauge closed bosonic string field theory for d ≠ 26. We show that the amplitudes can be recast into a BRST invariant form by adding a nonstandard worldsheet theory for the longitudinal variables X ± andthereparametrizationghostsystem. Theresultsobtainedinthispaperforbosonic strings provide a first step towards the examination whether the dimensional regularization works for the multiloop amplitudes of the light-cone gauge superstring field theory.