Quantized magnetic moment at the edge of a single-walled carbon nanotube

TL;DR

This paper explores how many-body effects induce a quantized magnetic moment at the edge of a single-walled carbon nanotube, depending on its topology, with implications for nanomagnet fabrication and spintronics.

Contribution

It reveals the quantized edge magnetic moment's dependence on the nanotube's chiral vector and uncovers supersymmetry in the edge state distribution.

Findings

Edge magnetic moment depends on nanotube topology

Supersymmetry approximately holds in realistic models

Potential applications in nanomagnet fabrication and spintronics

Abstract

We investigate many-body effects near the edge of a single-walled carbon nanotube and find it turns magnetic with quantized edge moment solely depends on the chiral vector, i.e. the topology of the carbon nanotube. The distribution of the edge moment reveals an approximate supersymmetry even in a realistic model. Our findings demonstrate crucial importance of the interplay between the electronic correlation and the edge morphology. The edge moment provides an excellent candidate for nanomagnet farbrication which has potential applications in biological and chemical detections, and in spintronics.