Aharonov-Bohm Exciton Absorption Splitting in Chiral Specific Single-Walled Carbon Nanotubes in Magnetic Fields of up to 78 T

TL;DR

This study observes Aharonov-Bohm exciton absorption splitting in specific single-walled carbon nanotubes under high magnetic fields, providing detailed measurements of excitonic energy splitting and A-A splitting rates.

Contribution

First experimental observation and quantification of Aharonov-Bohm splitting in chiral-specific SWNTs at magnetic fields up to 78 T.

Findings

Clear A-A splitting observed in absorption spectra

Determined dark-bright exciton energy splitting

Measured A-A splitting rate in high magnetic fields

Abstract

The Ajiki-Ando (A-A) splitting of single-walled carbon nanotubes(SWNT) originating from the Aharanov-Bohm effect was observed in chiral specific SWNTs by the magneto-absorption measurements conducted at magnetic fields of up to 78 T. The absorption spectra from each chirality showed clear A-A splitting of the $E_{11}$ optical excitonic transitions. The parameters of both the dark-bright exciton energy splitting and the rate of A-A splitting in a magnetic field were determined for the first time from the well-resolved absorption spectra.