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Plasmon-plasmon interaction and the role of buffer in epitaxial graphene microflakes
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SYSNO ASEP 0580713 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve SCOPUS Title Plasmon-plasmon interaction and the role of buffer in epitaxial graphene microflakes Author(s) Shestopalov, M. (CZ)
Dědič, V. (CZ)
Rejhon, M. (CZ)
Morzhuk, B. (CZ)
Kunc, J. (CZ)
Paingad, Vaisakh Chelod (FZU-D) ORCID
Kužel, Petr (FZU-D) RID, ORCID, SAI
Mohelský, I. (FR)
Le Mardelé, F. (FR)
Orlita, M. (FR)Number of authors 10 Article number 045308 Source Title Physical Review B. - : American Physical Society - ISSN 2469-9950
Roč. 108, č. 4 (2023)Number of pages 12 s. Language eng - English Country US - United States Keywords graphene ; magnetoplasmon ; terahertz ; infrared ; nanoribbons Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2023051 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 EID SCOPUS 85166748976 DOI 10.1103/PhysRevB.108.045308 Annotation We investigate the origin of the translational symmetry breaking in epitaxially grown single-layer graphene. Despite the surface morphology of graphene films influenced by the presence of mutually parallel SiC surface terraces, the far-infrared magnetoplasmon absorption is almost independent of the angle between the probing light polarization and the orientation of terraces. We explain this discrepancy by spontaneously formed graphene microflakes. We further support our conclusions by the data from confocal Raman mapping and atomic force microscopy and also using data collected on artificially created graphene nanoribbons. An unexpectedly large plasmon resonance redshift was observed in nanoribbons. This is due to an interplay between the plasmon-plasmon coupling and the Coulomb screening by the buffer-induced interface states in nonintercalated samples featuring a buffer layer. This model determines the density of interface states in agreement with experimentally reported values. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2024 Electronic address https://doi.org/10.1103/PhysRevB.108.045308
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