Nano Archive

Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking

Shaver, Jonah and Kono, Junichiro and Portugall, Oliver and Krstic, Vojislav and Rikken, Geert L. J. A. and Miyauchi, Yuhei and Maruyama, Shigeo and Perebeinos, Vasili (2007) Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking. NANO LETTERS, 7 (7). pp. 1851-1855.

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL: http://pubs.acs.org/doi/abs/10.1021/nl070260f

Abstract

We report that symmetry breaking by a magnetic field can drastically increase the photoluminescence quantum yield of single-walled carbon nanotubes, by as much as a factor of 6, at low temperatures. To explain this we have developed a theoretical model based on field-dependent exciton band structure and the interplay of Coulomb interactions and the Aharonov−Bohm effect. This conclusively explains our data as the first experimental observation of dark excitons 5−10 meV below the bright excitons.

Item Type:Article
Subjects:Physical Science > Nano objects
Physical Science > Quantum phenomena
ID Code:3188
Deposited By:Anuj Seth
Deposited On:26 May 2009 13:48
Last Modified:26 May 2009 13:48

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