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Title: Symmetry-induced nonequilibrium distributions of bright and dark exciton states in single carbon nanotubes
Authors: Matsunaga, Ryusuke
Miyauchi, Yuhei  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-0945-0265 (unconfirmed)
Matsuda, Kazunari  kyouindb  KAKEN_id
Kanemitsu, Yoshihiko  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-0788-131X (unconfirmed)
Author's alias: 金光, 義彦
Keywords: Aharonov-Bohm effect
carbon nanotubes
excitons
phonons
Issue Date: Sep-2009
Publisher: American Institute of Physics
Journal title: Physical Review B
Volume: 80
Issue: 11
Thesis number: 115436
Abstract: We investigated the magnetic and temperature dependence of the bright and dark exciton luminescence spectra in single carbon nanotubes. We found that the phonon-induced exciton scattering rate from the bright to the dark state is only one order of magnitude larger than the dark exciton recombination rate below 10 K at zero magnetic field. Our results indicate that excitons are nonequilibriumly distributed between the bright and dark states due to the different parities of the wave functions and that Aharonov-Bohm flux enhances the phonon-induced exciton scattering between these two states. Our nonequilibrium exciton distribution model can also explain the nonzero photoluminescence intensity at very low temperatures.
Rights: c 2009 The American Physical Society
URI: http://hdl.handle.net/2433/87338
DOI(Published Version): 10.1103/PhysRevB.80.115436
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