Quantum dot from chiral metallic single walled nanotubes

TL;DR

This paper presents a straightforward method to create quantum dots and electrodes using chiral metallic single-walled carbon nanotubes with opposite chiralities, enabling tunable electron confinement based on chirality choices.

Contribution

It introduces a novel, simple approach to construct quantum dots from specific chiral segments of single-walled carbon nanotubes, with potential for controlled electron confinement.

Findings

Electron confinement depends on chirality parameters (m,n).

Quantum-dot and electrode segments can be derived from a single nanotube.

Method allows for tunable electronic properties based on segment selection.

Abstract

We propose a simple approach to construct a quantum-dot and it's electrodes using chiral metallic single walled carbon nanotube (CM-SWCNT) segments of exactly opposite chiralities $(m,n)$ and $(n,m)$. The degree and energetics of electron confinement crucially depends on the choice of $n$ and $m$, and collinearity of the SWCNT segments constituting the quantum-dot and the electrodes. All the segments can in principle be obtained through simple manipulations of fragments of a single nanotube of chirality either $(m,n)$ or $(n,m)$.