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Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides
We report systematic optical studies of WS(2) and WSe(2) monolayers and multilayers. The efficiency of second harmonic generation shows a dramatic even-odd oscillation with the number of layers, consistent with the presence (absence) of inversion symmetry in even-layer (odd-layer). Photoluminescence...
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Artigo |
| Langue: | Inglês |
| Publié: |
Nature Publishing Group
2013
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| Sujets: | |
| Accès en ligne: | https://ncbi.nlm.nih.gov/pmc/articles/PMC3622914/ https://ncbi.nlm.nih.gov/pubmed/23575911 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1038/srep01608 |
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