Raman spectroscopy has been used in chemistry and physics to investigate the fundamental process involving light and phonons (quantum of lattice vibration). The carbon nanohorn introduces a new subject to Raman spectroscopy, namely topology. We show theoretically that a photo-excited carrier with a non-zero winding number activates a topological D Raman band through the Aharonov-Bohm effect. The topology-induced D Raman band can be distinguished from the ordinary D Raman band for a graphene edge by its peak position.
@article{arxiv.1304.4715,
title = {Topological Raman Band in Carbon Nanohorn},
author = {Ken-ichi Sasaki and Yoshiaki Sekine and Kouta Tateno and Hideki Gotoh},
journal= {arXiv preprint arXiv:1304.4715},
year = {2013}
}