Optical Phonon Interacting with Electrons in Carbon Nanotubes(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Effects of interactions with electrons on optical phonons are studied in an effective-mass approximation. The longitudinal mode with displacement in the axis direction is lowered in its frequency, while the transverse mode with displacement in the circumference direction is raised, in metallic nanotubes. The shifts are opposite but their absolute values are smaller in semiconducting nanotubes. Only the longitudinal mode has a considerable broadening in metallic nanotubes. In the presence of an Aharonov-Bohm magnetic flux, the broadening appears for the transverse mode and diverges when the induced gap becomes the same as the frequency of the optical phonon.
- 社団法人日本物理学会の論文
- 2006-08-15
著者
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Ando Tsuneya
Department Of Physics Faculty Of Science University Of Tokyo
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Ishikawa Kohta
Department Of Physics Tokyo Institute Of Technology
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Ishikawa Kohta
Department Of Molecular Science And Technology Faculty Of Engineering Doshisha University
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