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

摘要

We investigate many-body effects near the edge of a single-walled carbonnanotube and find it turns magnetic with quantized edge moment solely dependson the chiral vector, i.e. the topology of the carbon nanotube. Thedistribution of the edge moment reveals an approximate supersymmetry even in arealistic model. Our findings demonstrate crucial importance of the interplaybetween the electronic correlation and the edge morphology. The edge momentprovides an excellent candidate for nanomagnet farbrication which has potentialapplications in biological and chemical detections, and in spintronics.