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Exciton landscape i...
Exciton landscape in van der Waals heterostructures
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- Hagel, Joakim, 1994 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Brem, Samuel (författare)
- Philipps-Universität Marburg,Philipps University Marburg
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- Linderälv, Christopher, 1986 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Erhart, Paul, 1978 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Malic, Ermin, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Philipps-Universität Marburg,Philipps University Marburg
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(creator_code:org_t)
- 2021
- 2021
- Engelska.
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Ingår i: Physical Review Research. - 2643-1564. ; 3:4
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- van der Waals heterostructures consisting of vertically stacked transition-metal dichalcogenides (TMDs) exhibit a rich landscape of bright and dark intra- and interlayer excitons. In spite of a growing literature in this field of research, the type of excitons dominating optical spectra in different van der Waals heterostructures has not yet been well established. The spectral position of exciton states depends strongly on the strength of hybridization and energy renormalization due to the periodic moire potential. Combining exciton density-matrix formalism and density-functional theory, we shed light on the exciton landscape in TMD homo- and heterobilayers at different stackings. This allows us to identify on a microscopic footing the energetically lowest-lying exciton state for each material and stacking. Furthermore, we disentangle the contribution of hybridization and layer polarization-induced alignment shifts of dark and bright excitons in photoluminescence spectra. By revealing the exciton landscape in van der Waals heterostructures, our work provides the basis for further studies of the optical, dynamical, and transport properties of this technologically promising class of nanomaterials.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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