Excitonic fine structure in emission of linear carbon chains
Excitonic fine structure in emission of linear carbon chains
We studied monatomic linear carbon chains stabilized by gold nanoparticles attached to their ends and deposited on a solid substrate. We observe spectral features of straight chains containing from 8 to 24 atoms. Low-temperature PL spectra reveal characteristic triplet fine structures that repeat themselves for carbon chains of different lengths. The triplet is invariably composed of a sharp intense peak accompanied by two broader satellites situated 15 and 40 meV below the main peak. We interpret these resonances as an edge-state neutral exciton and positively and negatively charged trions, respectively. The time-resolved PL shows that the radiative lifetime of the observed quasiparticles is about 1 ns, and it increases with the increase of the length of the chain. At high temperatures a nonradiative exciton decay channel appears due to the thermal hopping of carriers between parallel carbon chains. Excitons in carbon chains possess large oscillator strengths and extremely low inhomogeneous broadenings.
Ab initio calculations, excitons
6502-6509
Kutrovskaya, Stella
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Osipov, Anton
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Baryshev, Stepan
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Zasedatelev, Anton
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Samyshkin, V
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Demirchyan, Sevak
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Pulci, O.
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Grassano, D.
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Gontrani, Lorenzo
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Hartmann, Richard
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Portnoi, Mikhail
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Kucherik, A.O
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Lagoudakis, Pavlos
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Kavokin, Alexey
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9 September 2020
Kutrovskaya, Stella
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Osipov, Anton
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Baryshev, Stepan
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Zasedatelev, Anton
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Samyshkin, V
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Demirchyan, Sevak
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Pulci, O.
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Grassano, D.
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Gontrani, Lorenzo
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Hartmann, Richard
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Portnoi, Mikhail
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Kucherik, A.O
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Lagoudakis, Pavlos
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Kavokin, Alexey
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Kutrovskaya, Stella, Osipov, Anton, Baryshev, Stepan, Zasedatelev, Anton, Samyshkin, V, Demirchyan, Sevak, Pulci, O., Grassano, D., Gontrani, Lorenzo, Hartmann, Richard, Portnoi, Mikhail, Kucherik, A.O, Lagoudakis, Pavlos and Kavokin, Alexey
(2020)
Excitonic fine structure in emission of linear carbon chains.
Nano Letters, 20 (9), .
(doi:10.1021/acs.nanolett.0c02244).
Abstract
We studied monatomic linear carbon chains stabilized by gold nanoparticles attached to their ends and deposited on a solid substrate. We observe spectral features of straight chains containing from 8 to 24 atoms. Low-temperature PL spectra reveal characteristic triplet fine structures that repeat themselves for carbon chains of different lengths. The triplet is invariably composed of a sharp intense peak accompanied by two broader satellites situated 15 and 40 meV below the main peak. We interpret these resonances as an edge-state neutral exciton and positively and negatively charged trions, respectively. The time-resolved PL shows that the radiative lifetime of the observed quasiparticles is about 1 ns, and it increases with the increase of the length of the chain. At high temperatures a nonradiative exciton decay channel appears due to the thermal hopping of carriers between parallel carbon chains. Excitons in carbon chains possess large oscillator strengths and extremely low inhomogeneous broadenings.
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e-pub ahead of print date: 30 July 2020
Published date: 9 September 2020
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Keywords:
Ab initio calculations, excitons
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Local EPrints ID: 457774
URI: http://eprints.soton.ac.uk/id/eprint/457774
ISSN: 1530-6984
PURE UUID: ea4af1e4-7b17-4d7d-aeb8-5d3ded012dec
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Date deposited: 16 Jun 2022 16:39
Last modified: 16 Mar 2024 16:32
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Author:
Stella Kutrovskaya
Author:
Anton Osipov
Author:
Stepan Baryshev
Author:
V Samyshkin
Author:
Sevak Demirchyan
Author:
O. Pulci
Author:
D. Grassano
Author:
Lorenzo Gontrani
Author:
Richard Hartmann
Author:
Mikhail Portnoi
Author:
A.O Kucherik
Author:
Pavlos Lagoudakis
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