Sökning: onr:"swepub:oai:research.chalmers.se:4671f2f2-3ac3-4339-8426-bc52a542147b" >
Dark and bright exc...
Dark and bright exciton formation, thermalization, and photoluminescence in monolayer transition metal dichalcogenides
-
- Selig, Malte, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Technische Universität Berlin
-
- Berghäuser, Gunnar, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Richter, Marten (författare)
- Technische Universität Berlin
-
visa fler...
-
- Bratschitsch, R. (författare)
- Westfaelische Wilhelms-Universität Münster,University of Münster
-
- Knorr, A. (författare)
- Technische Universität Berlin
-
- Malic, Ermin, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
visa färre...
-
(creator_code:org_t)
- 2018-05-04
- 2018
- Engelska.
-
Ingår i: 2D Materials. - : IOP Publishing. - 2053-1583. ; 5:3
- Relaterad länk:
-
http://arxiv.org/pdf...
-
visa fler...
-
https://research.cha...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- The remarkably strong Coulomb interaction in atomically thin transition metal dichalcogenides (TMDs) results in an extraordinarily rich many-particle physics including the formation of tightly bound excitons. Besides optically accessible bright excitonic states, these materials also exhibit a variety of dark excitons. Since they can even lie below the bright states, they have a strong influence on the exciton dynamics, lifetimes, and photoluminescence. While very recently, the presence of dark excitonic states has been experimentally demonstrated, the origin of these states, their formation, and dynamics have not been revealed yet. Here, we present a microscopic study shedding light on time- and energy-resolved formation and thermalization of bright and dark intra- and intervalley excitons as well as their impact on the photoluminescence in different TMD materials. We demonstrate that intervalley dark excitons, so far widely overlooked in current literature, play a crucial role in tungsten-based TMDs giving rise to an enhanced photoluminescence and reduced exciton lifetimes at elevated temperatures.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- photoluminescence
- excitons
- quantum yield
- exciton dynamics
- transition metal dichalcogenides
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas