A local-orbital based ab initio approach to obtain the Green's function for large heterogeneous systems is developed. First a Green's function formalism is introduced based on exact diagonalization. Then the self energy is constructed from an incremental scheme, rendering the procedure feasible, while at the same time physical insight into different local correlation contributions is obtained. Subsequently the Green's function is used in the frame of the Landauer theory and the wide band approximation to calculate the electronic transmission coefficient across molecular junctions. The theory is applied to meta- and para-ditholbenzene linked to gold electrodes and various correlation contributions are analyzed. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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Univ Penn, Dept Bioengn, Philadelphia, PA 19104 USAUniv Penn, Grad Grp Appl Math & Computat Sci, Dept Bioengn, Philadelphia, PA 19104 USA
Machida, Manabu
Panasyuk, George Y.
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Univ Penn, Dept Bioengn, Philadelphia, PA 19104 USAUniv Penn, Grad Grp Appl Math & Computat Sci, Dept Bioengn, Philadelphia, PA 19104 USA
Panasyuk, George Y.
Schotland, John C.
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Univ Penn, Grad Grp Appl Math & Computat Sci, Dept Bioengn, Philadelphia, PA 19104 USAUniv Penn, Grad Grp Appl Math & Computat Sci, Dept Bioengn, Philadelphia, PA 19104 USA
Schotland, John C.
Markel, Vadim A.
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Univ Penn, Dept Radiol, Philadelphia, PA 19104 USAUniv Penn, Grad Grp Appl Math & Computat Sci, Dept Bioengn, Philadelphia, PA 19104 USA
机构:Beijing Technol & Business Univ, Dept Phys, Beijing 100037, Peoples R China
Schnurpfeil, A
Song, B
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Beijing Technol & Business Univ, Dept Phys, Beijing 100037, Peoples R ChinaBeijing Technol & Business Univ, Dept Phys, Beijing 100037, Peoples R China
Song, B
Albrecht, M
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机构:Beijing Technol & Business Univ, Dept Phys, Beijing 100037, Peoples R China
机构:Nanjing Normal Univ, Sch Phys & Technol, NNU SULI Thermal Energy Res Ctr NSTER, Nanjing 210023, Peoples R China
Yu, Zhi-Zhou
Xiong, Guo-Huan
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机构:Nanjing Normal Univ, Sch Phys & Technol, NNU SULI Thermal Energy Res Ctr NSTER, Nanjing 210023, Peoples R China
Xiong, Guo-Huan
Zhang, Li-Fa
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Nanjing Normal Univ, Sch Phys & Technol, NNU SULI Thermal Energy Res Ctr NSTER, Nanjing 210023, Peoples R ChinaNanjing Normal Univ, Sch Phys & Technol, NNU SULI Thermal Energy Res Ctr NSTER, Nanjing 210023, Peoples R China