Quantum Transport Through Multiterminal Phenalenyl Molecular Bridges
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概要
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The quantum transport properties of multiterminal molecular bridge systems are theoretically studied with the Green's functions method based on an empirical tight-binding model. As an illustrated example, we adopt a phenalenyl molecule which has a nonbonding singly occupied molecular orbital (SOMO). For a comparative study, first the two-terminal molecular bridges, then the three- and four-terminal molecular bridges are calculated. For the two-terminal case, we find that the transmission spectra significantly depend on the terminal sites connected to the leads. For example, the transmission spectrum has a peak at $E=0.0$ (SOMO level) as long as both the source and drain are connected to the $\alpha$ sites, but otherwise a dip structure appears at this energy. As a general trend, even when the third and fourth terminals are connected, the transmission spectra do not change considerably from the corresponding spectra of the two-terminal cases. However, some attractive aspects, such as the disappearance of the dip at the SOMO level and a shift in the location of the large loop current, are newly found.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-05-15
著者
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Tsukada Masaru
Department Of Nano-science And Nano-technology Advanced School Of Science And Engineering Waseda Uni
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Tagami Katsunori
Department Of Molecular Engineering Graduate School Of Bioscience And Biotechnology Tokyo Institute
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Tagami Katsunori
Department of Physics, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
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Wang Liguang
Department of Physics, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
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Tsukada Masaru
Department of Physics, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
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Tsukada Masaru
Department of Nano-Science and Nano-Engineering, Waseda University, 513 Waseda Tsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
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