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Intertube excitonic coupling in nanotube van der Waals heterostructures
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Burdanova, Maria G., Staniforth, Michael, Anisimov, Anton, Kauppinen, Esko I, Liu, Ming, Zheng, Yongjia, Xiang, Rong, Chiashi, Shohei, Maruyama, Shigeo and Lloyd-Hughes, James (2022) Intertube excitonic coupling in nanotube van der Waals heterostructures. Advanced Functional Materials, 32 (11). 2104969. doi:10.1002/adfm.202104969 ISSN 1616-301X.
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Official URL: https://doi.org/10.1002/adfm.202104969
Abstract
Strong intertube excitonic coupling is demonstrated in 1D van der Waals heterostructures by examining the ultrafast response of radial C/BN/MoS$_2$ core/shell/skin nanotubes to femtosecond infrared light pulses.
Remarkably, infrared excitation of excitons in the semiconducting CNTs creates a prominent excitonic response in the visible range from the MoS$_2$ skin, even with infrared photons at energies well below the bandgap of MoS$_2$. Via classical analogies and a quantum model of the light-matter interaction we assign these findings to intertube excitonic correlations. Dipole-dipole Coulomb interactions in the coherent regime produce intertube biexcitons, which persist for tens of femtoseconds, while on longer timescales ($>100$\,ps) hole tunneling -- from the CNT core, through the BN tunnel barrier, to the MoS$_2$ skin -- creates intertube excitons. Charge transfer and dipole-dipole interactions thus play prominent roles on different timescales, and establish new possibilities for the multi-functional use of these new nano-scale coaxial cables.
Item Type: | Journal Article | |||||||||||||||||||||
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Subjects: | Q Science > QC Physics | |||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Science > Physics |
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Library of Congress Subject Headings (LCSH): | Exciton theory, Carbon nanotubes, Heterostructures, Van der Waals forces | |||||||||||||||||||||
Journal or Publication Title: | Advanced Functional Materials | |||||||||||||||||||||
Publisher: | Wiley | |||||||||||||||||||||
ISSN: | 1616-301X | |||||||||||||||||||||
Official Date: | 9 March 2022 | |||||||||||||||||||||
Dates: |
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Volume: | 32 | |||||||||||||||||||||
Number: | 11 | |||||||||||||||||||||
Article Number: | 2104969 | |||||||||||||||||||||
DOI: | 10.1002/adfm.202104969 | |||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||
Date of first compliant deposit: | 14 September 2021 | |||||||||||||||||||||
Date of first compliant Open Access: | 28 September 2021 | |||||||||||||||||||||
RIOXX Funder/Project Grant: |
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