Weak Localization in Multiwall Carbon Nanotubes in a Perpendicular Magnetic Field(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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The weak-localization (WL) effect on electron transport is studied for multiwall carbon nanotubes in a uniform perpendicular magnetic field. The influence of a magnetic field on the WL effect is determined by its component normal to the rolled surface of nanotubes, so an effective magnetic field is nonuniform. We adopt a disordered two-dimensional electron system rolled into a cylinder as a minimal model, and obtain the WL correction to conductivity taking account of the cylindrical structure and the spatial nonuniformity of an effective magnetic field. The result is compared with the WL correction in a two-dimensional strip in a uniform perpendicular magnetic field. It is shown that their magnetic-field dependences are qualitatively equivalent to each other. However, it is also shown that the magnetic-field dependence in a cylinder is quantitatively less pronounced than that in a strip reflecting the nonuniformity of an effective magnetic field as well as the cylindrical structure.
- 社団法人日本物理学会の論文
- 2006-04-15
著者
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Takane Yositake
Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University
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Takane Yositake
Department Of Applied Physics Osaka City University
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