Pregled bibliografske jedinice broj: 1073565
Anomalous Temperature Dependence of Exciton Spectral Diffusion in Tetracene Thin Film
Anomalous Temperature Dependence of Exciton Spectral Diffusion in Tetracene Thin Film // Journal of Physical Chemistry Letters, 11 (2020), 13; 5248-5254 doi:10.1021/acs.jpclett.0c01537 (međunarodna recenzija, članak, znanstveni)
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Naslov
Anomalous Temperature Dependence of Exciton
Spectral Diffusion in Tetracene Thin Film
Autori
Yoshida, Tatsuya ; Watanabe, Kazuya ; Petrović, Marin ; Kralj, Marko
Izvornik
Journal of Physical Chemistry Letters (1948-7185) 11
(2020), 13;
5248-5254
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Excitons ; Phonons ; Thin films ; Diffusion ; Temperature dependence ; Graphene ; Tetracene
Sažetak
In this work, an ultrafast spectral diffusion of the lowest exciton in a tetracene ultrathin film is studied by two-dimensional electronic spectroscopy. From the analysis of the nodal line slope, the frequency- fluctuation correlation function (FFCF) of the exciton band is extracted. The FFCF contains two components with decay times of 400 and 80 fs ; while the former can be understood by a linear exciton–phonon coupling model, the latter shows an order of magnitude increase in its amplitude from 96 to 186 K that cannot be explained by the same model. A novel scheme of the energy-gap fluctuations is examined, in which an intramolecular high-frequency mode causes the spectral diffusion that is enhanced through an anharmonic coupling to low-frequency phonon modes. This finding provides a valuable input for future theoretical predictions on the ultrafast nonadiabatic dynamics of the molecular exciton.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
KK.01.1.01.0001
HRZZ-IP-2016-06-3211 - Optička svojstva heterostruktura dihalkogenida prijelaznih metala (OhTMD) (Kralj, Marko, HRZZ - 2016-06) ( CroRIS)
Ustanove:
Institut za fiziku, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- MEDLINE
- Nature Index