Exciton energy spectra in polyyne chains
Exciton energy spectra in polyyne chains
Recently, we have experimentally observed signatures of sharp exciton peaks in the photoluminescence spectra of bundles of monoatomic carbon chains stabilized by gold nanoparticles and deposited on a glass substrate. Here we estimate the characteristic energies of excitonic transitions in this complex quasi-one-dimensional nanosystem with use of the variational method. We show that the characteristic energy scale for the experimentally observed excitonic fine structure is governed by the interplay between the hopping energy in a Van der Waals quasicrystal formed by parallel carbon chains, neutral-charged exciton splitting, and positive-negative trion splitting. These three characteristic energies are an order of magnitude lower than the direct exciton binding energy.
Kutrovskaya, Stella
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Demirchyan, Sevak
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Osipov, A
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Baryshev, Stepan
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Zasedatelev, Anton
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Lagoudakis, Pavlos
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Kavokin, Alexey
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22 January 2021
Kutrovskaya, Stella
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Demirchyan, Sevak
7411fbe4-448b-4430-960c-0ae0eabeba09
Osipov, A
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Baryshev, Stepan
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Zasedatelev, Anton
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Lagoudakis, Pavlos
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Kavokin, Alexey
70ffda66-cfab-4365-b2db-c15e4fa1116b
Kutrovskaya, Stella, Demirchyan, Sevak, Osipov, A, Baryshev, Stepan, Zasedatelev, Anton, Lagoudakis, Pavlos and Kavokin, Alexey
(2021)
Exciton energy spectra in polyyne chains.
Physical Review Research, 3 (1).
(doi:10.1103/PhysRevResearch.3.013071).
Abstract
Recently, we have experimentally observed signatures of sharp exciton peaks in the photoluminescence spectra of bundles of monoatomic carbon chains stabilized by gold nanoparticles and deposited on a glass substrate. Here we estimate the characteristic energies of excitonic transitions in this complex quasi-one-dimensional nanosystem with use of the variational method. We show that the characteristic energy scale for the experimentally observed excitonic fine structure is governed by the interplay between the hopping energy in a Van der Waals quasicrystal formed by parallel carbon chains, neutral-charged exciton splitting, and positive-negative trion splitting. These three characteristic energies are an order of magnitude lower than the direct exciton binding energy.
Text
PhysRevResearch.3.013071
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Accepted/In Press date: 22 December 2020
Published date: 22 January 2021
Identifiers
Local EPrints ID: 456256
URI: http://eprints.soton.ac.uk/id/eprint/456256
ISSN: 2643-1564
PURE UUID: c8884f76-76f0-444c-af81-e93dbf2d7123
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Date deposited: 26 Apr 2022 23:52
Last modified: 16 Mar 2024 16:32
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Author:
Stella Kutrovskaya
Author:
Sevak Demirchyan
Author:
A Osipov
Author:
Stepan Baryshev
Author:
Pavlos Lagoudakis
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