We have applied the quantum Monte Carlo method and tight-binding modeling to calculate the binding energy of biexcitons in semiconductor carbon nanotubes for a wide range of diameters and chiralities. For typical nanotube diameters we find that biexciton binding energies are much larger than previously predicted from variational methods, which easily brings the biexciton binding energy above the room temperature threshold.
Biexciton Stability in Carbon Nanotubes / Kammerlander, David; Prezzi, Deborah; Goldoni, Guido; Molinari, Elisa; AND U., Hohenester. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 99:12(2007), pp. 1-4. [10.1103/PhysRevLett.99.126806]
Biexciton Stability in Carbon Nanotubes
KAMMERLANDER, DAVID;PREZZI, Deborah;GOLDONI, Guido;MOLINARI, Elisa;
2007
Abstract
We have applied the quantum Monte Carlo method and tight-binding modeling to calculate the binding energy of biexcitons in semiconductor carbon nanotubes for a wide range of diameters and chiralities. For typical nanotube diameters we find that biexciton binding energies are much larger than previously predicted from variational methods, which easily brings the biexciton binding energy above the room temperature threshold.
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