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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

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Official URL: https://doi.org/10.1002/adfm.202104969

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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
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Chemistry
Faculty of Science, Engineering and Medicine > Science > Physics
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:
DateEvent
9 March 2022Published
21 September 2021Available
3 September 2021Accepted
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
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/N010825/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
JP18H05329[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
JP19H02543[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
JP20H00220[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
JP20KK0114[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
JPMJCR20B5Japan Science and Technology Agencyhttp://dx.doi.org/10.13039/501100002241

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