Ab initio modeling of real molecular logic devices

Junqiang Lu, Hao Chen, Jian Wu, Hiroshi Mizuseki, Yoshiyuki Kawazoe

研究成果: Article査読

7 被引用数 (Scopus)

抄録

Green function and first principle theories are used to investigate electron transport through the polyphenylene-based molecular rectifying diode switch, which is attached to gold electrodes at both ends. The coupling at the interface between the molecular device and the electrodes is treated carefully. The Green function of the electrode is built by the standard parameterized tight-binding method. The effect of the molecular orbitals on the conductance is shown clearly in the conductance curve. The conductance calculated from the approximated Green function method, which is composed of spd/sp/s model, is presented. The difference between our Green function and the current approximated Green function is discussed. The result suggests that the Green function made from sp orbital model is a good approximation. Besides, the molecular structure of the diode-diode-type AND gate, composed of the polyphenylene-based molecular wires, is energetically optimized. Some of its orbitals, near the Fermi level, are presented. Our calculation method can be extended straightforwardly to any organic molecular system, which is connected by the electrodes.

本文言語English
ページ(範囲)2270-2275
ページ数6
ジャーナルMaterials Transactions
42
11
DOI
出版ステータスPublished - 2001 11

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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