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Selection Rules for One- and Two-Photon Absorption by Excitons in Carbon Nanotubes
Eduardo B. Barros, Rodrigo. B. Capaz, Ado Jorio +7
Recent optical absorption/emission experiments showed that the lower energy optical transitions in carbon nanotubes are excitonic in nature, as predicted by theory. These experimen…
Diameter and Chirality Dependence of Exciton Properties in Carbon Nanotubes
Rodrigo B. Capaz, Catalin D. Spataru, Sohrab Ismail-Beigi +1
We calculate the diameter and chirality dependences of the binding energies, sizes, and bright-dark splittings of excitons in semiconducting single-wall carbon nanotubes (SWNTs). U…
Truncation of Periodic Image Interactions for Confined Systems
Sohrab Ismail-Beigi
First principles methods based on periodic boundary conditions are used extensively by materials theorists. However, applying these methods to systems with confined electronic stat…