Optical-Phonon Resonances with Saddle-Point Excitons in Twisted-Bilayer Graphene
| العنوان: | Optical-Phonon Resonances with Saddle-Point Excitons in Twisted-Bilayer Graphene |
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| المؤلفون: | Jorio, Ado, Kasperczyk, Mark, Clark, Nick, Neu, Elke, Maletinsky, Patrick, Vijayaraghavan, Aravind, Novotny, Lukas |
| بيانات النشر: | ETH Zurich |
| مصطلحات موضوعية: | Raman scattering, Optical reflectivity, Graphene, Coherence, 3. Good health |
| الوصف: | Twisted-bilayer graphene (tBLG) exhibits van Hove singularities in the density of states that can be tuned by changing the twisting angle θ. A θ-defined tBLG has been produced and characterized with optical reflectivity and resonance Raman scattering. The θ-engineered optical response is shown to be consistent with persistent saddle-point excitons. Separate resonances with Stokes and anti-Stokes Raman scattering components can be achieved due to the sharpness of the two-dimensional saddle-point excitons, similar to what has been previously observed for one-dimensional carbon nanotubes. The excitation power dependence for the Stokes and anti-Stokes emissions indicate that the two processes are correlated and that they share the same phonon. Nano Letters, 14 (10) ISSN:1530-6984 ISSN:1530-6992 |
| اللغة: | English |
| تدمد: | 1530-6984 1530-6992 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::20f5c4b2225aa7de0dd84f4a2c918e45Test |
| رقم الانضمام: | edsair.doi...........20f5c4b2225aa7de0dd84f4a2c918e45 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15306984 15306992 |
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