Electronic Properties of Topological Materials : Optical Excitations in Mobius Conjugated Polymers(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Electronic structures and optical excitations in Mobius conjugated polymers are studied theoretically. Periodic and Mobius boundary conditions are applied to the tight binding model of poly(paraphenylene), taking exciton effects into account. We discuss that oligomers with a few structural units are more effective than polymers for observations of effects of discrete wave numbers that are shifted by the change in boundary condition. Next, calculations of optical absorption spectra are reported. Certain components of optical absorption for an electric field perpendicular to the polymer axis mix with absorption spectra for an electric field parallel to the polymer axis. Therefore, the polarization dependences of an electric field of light enable us to detect whether conjugated polymers have the Mobius boundary.
- 社団法人日本物理学会の論文
- 2005-02-15
著者
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Harigaya Kikuo
Nanotechnology Research Institute Aist:synthetic Nano-function Materials Project Aist
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Harigaya Kikuo
Nanotechnology Research Institute Aist
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- Electronic Properties of Topological Materials : Optical Excitations in Mobius Conjugated Polymers(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)