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| Excitonic wavefunction on four different sized nanotube structures |
Topology of Exciton in Artificial Structure
We have theoretically demonstrated that the excitons in nanotube structures show the variety of topological states depending on the size of the nanotube. This is due to the fact that an exciton has its own characteristic size and it determines the confinement feature of the exciton in the structure. It is also shown that the topology of the exciton wavefunction can be controlled through the dielectric constant of the barrier material surrounding the nanotubes. (Page 35)