Linking chiral indices and transport properties of double-walled carbon nanotubes |
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Authors: | Kociak M Suenaga K Hirahara K Saito Y Nakahira T Iijima S |
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Institution: | JST-ICORP Nanotubulites Project, Meijo University, Nagoya 468-8502, Japan. |
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Abstract: | We performed in situ transport measurements in a transmission-electron microscope (TEM) on individual double-walled carbon nanotubes (DWNT). Using selected-area electron diffraction, the chiral indices of the two tubes constituting the DWNTs were determined through careful comparison with theory. We discuss the case of a DWNT whose two tubes have a gap at half filling and show a finite density of delocalized state at the Fermi level. The exact determination of chiral indices should be reachable in any transport-measurement experiment with samples that allow TEM characterization. |
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