Real-space imaging of the tailored plasmons in twisted bilayer graphene
| العنوان: | Real-space imaging of the tailored plasmons in twisted bilayer graphene |
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| المؤلفون: | Yong P. Chen, Ting-Fung Chung, Fengrui Hu, Suprem R. Das, Yilong Luan, Zhe Fei |
| المصدر: | Hu, F; Das, SR; Luan, Y; Chung, T-F; Chen, YP; & Fei, Z. (2017). Real-Space Imaging of the Tailored Plasmons in Twisted Bilayer Graphene. PHYSICAL REVIEW LETTERS, 119(24). doi: 10.1103/PhysRevLett.119.247402. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/50j7d1n8 |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Materials science, Dirac (software), Physics::Optics, General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, 01 natural sciences, law.invention, symbols.namesake, law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Physics::Atomic and Molecular Clusters, Twist, 010306 general physics, Plasmon, Coupling, Condensed Matter - Materials Science, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, Graphene, Materials Science (cond-mat.mtrl-sci), 021001 nanoscience & nanotechnology, Wavelength, symbols, van der Waals force, 0210 nano-technology, Bilayer graphene, Optics (physics.optics), Physics - Optics |
| الوصف: | We report a systematic plasmonic study of twisted bilayer graphene (TBLG) - two graphene layers stacked with a twist angle. Through real-space nanoimaging of TBLG single crystals with a wide distribution of twist angles, we find that TBLG supports confined infrared plasmons that are sensitively dependent on the twist angle. At small twist angles, TBLG has a plasmon wavelength comparable to that of single-layer graphene. At larger twist angles, the plasmon wavelength of TBLG increases significantly with apparently lower damping. Further analysis and modeling indicate that the observed twist-angle dependence of TBLG plasmons in the Dirac linear regime is mainly due to the Fermi-velocity renormalization, a direct consequence of interlayer electronic coupling. Our work unveils the tailored plasmonic characteristics of TBLG and deepens our understanding of the intriguing nano-optical physics in novel van der Waals coupled two-dimensional materials. 22 pages |
| وصف الملف: | application/pdf |
| اللغة: | English |
| DOI: | 10.1103/PhysRevLett.119.247402. |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::774692145a6e94056c09312f75ab63cc http://arxiv.org/abs/2301.11646 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....774692145a6e94056c09312f75ab63cc |
| قاعدة البيانات: | OpenAIRE |
| DOI: | 10.1103/PhysRevLett.119.247402. |
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