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arXiv · 2512.05153

Reciprocal tube tight-binding approximation method for carbon nanotubes

Yuri A. Antipov
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Abstract

The electronic structure of a graphene sheet is altered when it is rolled up to form a single-walled carbon nanotube (SWCNT), and the curvature effects for small radius nanotubes become significant. In the paper, an analogue of the Bloch theory and tight-binding approximation for armchair, zigzag, and chiral SWCNTs is proposed. The main features of the technique include the use of reciprocal nanotubes, translation-rotation transformations applied simultaneously in the real and reciprocal three-dimensional (3d) spaces, and construction of associated 2d Brillouin zones and Bloch double sums. Both sums have macroscopically large numbers of terms and built up by using two intersecting helices. The method is efficient for all range nanotubes, narrow, intermediate-radius, and megatubes. Electronic band structures calculations for sample chiral, armchair, and zigzag nanotubes are reported.

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Yuri A. Antipov. 2025-12-03. Reciprocal tube tight-binding approximation method for carbon nanotubes. https://arxiv.org/abs/2512.05153

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