Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking

Jonah Shaver; Junichiro Kono; Oliver Portugall; Vojislav Krstic̀; Geert L.J.A. Rikken; Yuhei Miyauchi; Shigeo Maruyama; Vasili Perebeinos

doi:10.1021/nl070260f

Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking

Jonah Shaver, Junichiro Kono, Oliver Portugall, Vojislav Krstic̀, Geert L.J.A. Rikken, Yuhei Miyauchi, Shigeo Maruyama, Vasili Perebeinos

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

115 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1851-1855
Number of pages	5
Journal	Nano letters
Volume	7
Issue number	7
DOIs	https://doi.org/10.1021/nl070260f
State	Published - Jul 2007

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10.1021/nl070260f

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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.",

author = "Jonah Shaver and Junichiro Kono and Oliver Portugall and Vojislav Krsti{\`c} and Rikken, {Geert L.J.A.} and Yuhei Miyauchi and Shigeo Maruyama and Vasili Perebeinos",

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T1 - Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking

AU - Shaver, Jonah

AU - Kono, Junichiro

AU - Portugall, Oliver

AU - Krstic̀, Vojislav

AU - Rikken, Geert L.J.A.

AU - Miyauchi, Yuhei

AU - Maruyama, Shigeo

AU - Perebeinos, Vasili

PY - 2007/7

Y1 - 2007/7

N2 - 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.

AB - 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.

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JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

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Magnetic brightening of carbon nanotube photoluminescence through symmetry breaking

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