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Phys. Rev. Lett. 68, 1579 - 1581 (1992)

New one-dimensional conductors: Graphitic microtubules

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Noriaki Hamada, Shin-ichi Sawada, and Atsushi Oshiyama
Fundamental Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba 305, Japan
Microelectronics Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba 305, Japan

Received 9 December 1991

On the basis of realistic tight-binding band-structure calculations, we predict that carbon microtubules exhibit striking variations in electronic transport, from metallic to semiconducting with narrow and moderate band gaps, depending on the diameter of the tubule and on the degree of helical arrangement of the carbon hexagons. The origin of this drastic variation in the band structure is explained in terms of the two-dimensional band structure of graphite.


©1992 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.68.1579
DOI: 10.1103/PhysRevLett.68.1579
PACS: 71.20.Hk, 36.20.Kd, 71.25.-s

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