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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2019

Spectroscopic signatures of spin-orbit coupling and free excitons in individual suspended carbon nanotubes

Résumé

We investigate the intrinsic magneto-optical properties of suspended single-walled carbon nanotubes of various chiralities, using a combination of spectrally and time-resolved spectroscopy of individual nanotubes at low temperature. This study elucidates the population and relaxation dynamics of the lowest-energy bright and dark singlet excitons that are mixed with the Aharonov-Bohm effect. The high-quality emission spectra reveal the residual oscillator strength of the dark exciton in zero field, as an optical signature of spin-orbit coupling. They also unveil an asymmetry in the bright exciton recombination line, attributed to the free nature of excitons in these unperturbed nanotubes.
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hal-02276555 , version 1 (02-09-2019)

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Morgane Gandil, Kazunari Matsuda, Brahim Lounis, Philippe Tamarat. Spectroscopic signatures of spin-orbit coupling and free excitons in individual suspended carbon nanotubes. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2019, 100 (8), ⟨10.1103/PhysRevB.100.081411⟩. ⟨hal-02276555⟩
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